CRA Audit Support Accountant in Ontario (ON)

Virtual cra audit support for Ontario — 1,011 communities served, CRA EFILE registered, same fees across the province.

Call a CRA Audit Support Accountant in Ontario — 780-667-5250 Get CRA Audit Defense

BOMCAS Canada provides CRA audit, review, and reassessment representation to clients across Ontario, serving all 1,011 known communities in the province — from major centres like Barrie, Brampton, Brantford, Greater Sudbury, Guelph to the most remote village and hamlet. 64 Ontario cities currently have a dedicated CRA Audit Support service page; every other community is served through this provincial hub and a virtual delivery model.

CRA Audit Support in Ontario: what every taxpayer needs to know

Ontario is Canada's largest provincial economy and the country's financial, technological, and manufacturing centre. Ontario uses HST (Harmonized Sales Tax) at 13%, combining the 5% federal GST with an 8% provincial portion. The Toronto-Waterloo Innovation Corridor is one of North America's leading technology clusters, and the province is home to most of Canada's major banks, insurers, and headquartered multinationals.

Ontario uses HST, so businesses register once with CRA for combined GST/HST collection and remittance. The province has a separate Employer Health Tax (EHT) for employers above the exemption threshold and a corporate minimum tax for large corporations. Ontario also offers refundable film/digital media tax credits, the Ontario Innovation Tax Credit, and the Ontario Production Services Tax Credit.

For cra audit support specifically, the Ontario environment matters because CRA audits originating from Ontario Tax Services Offices follow the same federal rules as elsewhere in Canada, but Ontario-specific deductions (provincial tax credits, sales-tax allocations, and provincially regulated industry rules) often trigger the initial review.

Who we serve with cra audit support in Ontario

Our Ontario cra audit support clients include individuals and businesses that received a CRA pre-assessment review, post-assessment audit letter, GST/HST audit, payroll examination, or Notice of Reassessment.

Because Ontario’s economy includes finance & banking, manufacturing, automotive, technology, we have particular depth serving operators in those sectors.

What is included in our Ontario cra audit support service

  • Direct CRA representation under signed Form AUT-01
  • Document request response and supporting working paper packages
  • Audit-position memos defending claimed deductions and credits
  • Notice of Objection (Form T400A) preparation and filing within 90 days
  • Taxpayer Relief applications for penalty and interest cancellation
  • Negotiation of audit adjustments before final reassessment
  • Tax Court of Canada referrals when objection is denied
  • Future audit-proofing of your bookkeeping and documentation

Applicable CRA forms and schedules: AUT-01 (authorization), T400A (Notice of Objection), RC4288 (Taxpayer Relief), T7DR-A (payment voucher), T2029 (waiver of normal reassessment period).

Typical pricing in Ontario: CRA correspondence audits start at $500. Field audits, GST/HST audits, and Notices of Objection are quoted after a free first review of the CRA letter.

Common cra audit support problems we fix for Ontario taxpayers

Most of our Ontario clients come to us after running into one of these recurring issues:

  • Notice of Reassessment that disallows deductions because supporting receipts are missing
  • CRA "net-worth audit" assuming unreported income from lifestyle indicators
  • GST/HST audits that disallow ITCs without proper supplier invoices
  • payroll examinations finding misclassified contractors
  • missed 90-day objection window that locks in the reassessment

Every issue above has a defined CRA remedy. We document the position, prepare the supporting paperwork, file with the CRA, and represent you through any follow-up correspondence.

Deadlines and CRA timing for Ontario

A Notice of Objection must be filed within 90 days of the Notice of (Re)Assessment. Beyond that window, a one-year extension request can be filed but is granted only in limited circumstances. CRA document requests typically allow 30 days to respond.

BOMCAS Canada tracks every deadline on a per-client compliance calendar. You receive reminders well before each due date, and we file electronically to give you proof of timely submission.

CRA Audit Support by city in Ontario

Below are the Ontario cities and towns with a dedicated CRA Audit Support service page. Every community listed has its own SEO-optimized landing page with local context, FAQs, and the same scope of work described on this hub.

CRA Audit Support in Barrie CRA Audit Support in Brampton CRA Audit Support in Brantford CRA Audit Support in Greater Sudbury CRA Audit Support in Guelph CRA Audit Support in Mississauga CRA Audit Support in Oshawa CRA Audit Support in Ottawa CRA Audit Support in Sarnia CRA Audit Support in St. Catharines CRA Audit Support in Thunder Bay CRA Audit Support in Toronto CRA Audit Support in Vaughan CRA Audit Support in Amherstburg CRA Audit Support in Arnprior CRA Audit Support in Atikokan CRA Audit Support in Bradford West Gwillimbury CRA Audit Support in Brockville CRA Audit Support in Bruce Mines CRA Audit Support in Carleton Place CRA Audit Support in Clarence-Rockland CRA Audit Support in Cobourg CRA Audit Support in County of Brant CRA Audit Support in Deseronto CRA Audit Support in East Gwillimbury CRA Audit Support in Elliot Lake CRA Audit Support in Englehart CRA Audit Support in Fort Frances CRA Audit Support in Gananoque CRA Audit Support in Greater Napanee CRA Audit Support in Haldimand County CRA Audit Support in Halton Hills CRA Audit Support in Hilton Beach CRA Audit Support in Innisfil CRA Audit Support in Iroquois Falls CRA Audit Support in Kapuskasing CRA Audit Support in Kawartha Lakes CRA Audit Support in Kenora CRA Audit Support in Kirkland Lake CRA Audit Support in Laurentian Hills CRA Audit Support in Merrickville–Wolford CRA Audit Support in Moosonee CRA Audit Support in New Tecumseth CRA Audit Support in Niagara-on-the-Lake CRA Audit Support in Orillia CRA Audit Support in Owen Sound CRA Audit Support in Penetanguishene CRA Audit Support in Petawawa CRA Audit Support in Plympton–Wyoming CRA Audit Support in Port Colborne CRA Audit Support in Quinte West CRA Audit Support in Saugeen Shores CRA Audit Support in Smiths Falls CRA Audit Support in Smooth Rock Falls CRA Audit Support in South Bruce Peninsula CRA Audit Support in Temiskaming Shores CRA Audit Support in Thessalon CRA Audit Support in Thornloe CRA Audit Support in Thorold CRA Audit Support in Tillsonburg CRA Audit Support in Timmins CRA Audit Support in Wasaga Beach CRA Audit Support in Welland CRA Audit Support in Whitchurch-Stouffville
View all 947 smaller communities in Ontario we also serve
Aamjiwnaang First Nation Addington County, Ontario Addington Highlands Addington Highlands, Ontario Adelaide Metcalfe Adelaide Metcalfe, Ontario Adjala-Tosorontio Admaston Township, Ontario Admaston/Bromley Ajax, Ontario Akwesasne 59 Albemarle Township, Ontario Alberton, Ontario Albion Township, Ontario Aldborough Township, Ontario Alderville First Nation Alfred and Plantagenet Alfred and Plantagenet, Ontario Algoma District Algoma, Unorganized, North Part Algoma, Unorganized, South East Part, Ontario Algonquin Highlands Algonquin Highlands, Ontario Algonquins of Pikwàkanagàn First Nation Alice Township, Ontario Alnwick/Haldimand Alnwick/Haldimand, Ontario Amabel Township, Ontario Amaranth, Ontario Ameliasburgh Township, Ontario Amherst Island, Ontario Amherstburg, Ontario Ancaster Township, Ontario Anderdon Township, Ontario Armour, Ontario Armstrong, Ontario Arnold Township, Ontario Arnprior, Ontario Arran Township, Ontario Arran-Elderslie, Ontario Arran–Elderslie Arthur, Ontario Ashfield-Colborne-Wawanosh, Ontario Ashfield–Colborne–Wawanosh Asphodel-Norwood Assiginack Assiginack, Ontario Association of Municipalities of Ontario Athens, Ontario Atikokan, Ontario Augusta, Ontario Aurora, Ontario Aylmer, Ontario Bagot Township, Ontario Baldwin, Ontario Bancroft, Ontario Bangor Township, Ontario Barrie Island, Ontario Bastard Township, Ontario Bathurst Township, Ontario Bayham Bayham, Ontario Beckwith, Ontario Belleville, Ontario Ben Nevis Township Bentinck, Ontario Bertie Township, Ontario Best Township, Ontario Bethune Township, Ontario Beverley Township, Ontario Biddulph Township, Ontario Billings, Ontario Black River-Matheson Black River-Matheson, Ontario Blair Township, Ontario Blandford-Blenheim Blandford-Blenheim, Ontario Blind River, Ontario Bloomfield, Ontario Bluewater, Ontario Blythfield Township, Ontario Bompas Township, Ontario Bonfield, Ontario Bonnechere Valley Bonnechere Valley, Ontario Bracebridge, Ontario Bradford-West Gwillimbury, Ontario Brampton, Ontario Brant Township, Ontario Brantford Township, Ontario Brethour Brethour, Ontario Briggs Township, Ontario Brighton, Ontario Brock Township, Ontario Brock, Ontario Brockton, Ontario Brockville, Ontario Bromley Township, Ontario Brooke-Alvinston Brooke-Alvinston, Ontario Brougham Township, Ontario Brown Township, Ontario Bruce County Bruce Mines, Ontario Bruce Township, Ontario Brudenell Township, Ontario Brudenell, Lyndoch and Raglan Buchanan Township, Ontario Burford Township, Ontario Burlington, Ontario Burns Township, Ontario Burpee Township, Ontario Burpee and Mills Burpee and Mills, Ontario Burton Township, Ontario Caledon Township, Ontario Caledon, Ontario Callander, Ontario Calvin, Ontario Cambridge Township, Ontario Cambridge, Ontario Camden Township, Kent County, Ontario Campbell Township, Ontario Canada Canborough Township, Ontario Capreol, Ontario Caradoc Township, Ontario Carleton County, Ontario Carleton Place, Ontario Carling, Ontario Carlow/Mayo Carlow/Mayo, Ontario Carrick Township, Ontario Cartwright Township, Ontario Casey, Ontario Casselman, Ontario Cavan Monaghan Cavan Township, Ontario Cavan-Monaghan, Ontario Central Elgin Central Elgin, Ontario Central Frontenac Central Frontenac, Ontario Central Huron Central Huron, Ontario Central Manitoulin Central Manitoulin, Ontario Central Ontario Centre Hastings Centre Hastings, Ontario Centre Wellington Centre Wellington, Ontario Chamberlain, Ontario Chambers Township, Ontario Champlain, Ontario Chapleau, Ontario Chapman Township, Ontario Chapple, Ontario Charlottenburgh Township, Ontario Charlotteville Township, Ontario Charlton and Dack Charlton and Dack, Ontario Chatham Township, Ontario Chatham-Kent Chatsworth, Ontario Chinguacousy Township, Ontario Chippewas of Georgina Island First Nation Chippewas of Kettle and Stony Point First Nation Chippewas of Nawash Unceded First Nation Chippewas of Rama First Nation Chippewas of the Thames First Nation 42, Ontario Chisholm, Ontario Christian Island 30, Ontario Christian Island 30A, Ontario Christie Township, Ontario Clara Township, Ontario Clarence Township, Ontario Clarence-Rockland, Ontario Clarington Clarington, Ontario Clarke Township, Ontario Clearview, Ontario Clinton Township, Ontario Cobalt, Ontario Cobourg, Ontario Cochrane District Cochrane, Ontario Cochrane, Unorganized, North Part, Ontario Cochrane, Unorganized, South East Part, Ontario Cochrane, Unorganized, South West Part, Ontario Cockburn Island Cockburn Island, Ontario Colchester South Township, Ontario Coleman, Ontario Collingwood, Ontario Conger Township, Ontario Conmee, Ontario Cornwall Township, Ontario Cornwall, Ontario Cowper Township, Ontario Cramahe, Ontario Croft Township, Ontario Culross Township, Ontario Cumberland Township, Ontario Curve Lake First Nation 35, Ontario Dalhousie Township, Ontario Dalton Township, Ontario Darling Township, Ontario Darlington Township, Ontario Dawn-Euphemia Dawn-Euphemia, Ontario Dawson Township, Manitoulin District, Ontario Dawson, Ontario Deep River, Ontario Deseronto, Ontario Detroit Digby Township, Ontario Discuss improvements to the content page [t] District Municipality of Muskoka District of Muskoka Dorion, Ontario Douro-Dummer Dover Township, Ontario Drummond Township, Ontario Drummond/North Elmsley Drummond/North Elmsley, Ontario Dryden, Ontario Dubreuilville Dufferin County Dundas County, Ontario Dunnville, Ontario Durham County, Ontario Dutton-Dunwich, Ontario Dutton/Dunwich Dysart et al Dysart et al., Ontario Ear Falls Ear Falls, Ontario East Ferris East Ferris, Ontario East Garafraxa East Garafraxa, Ontario East Gwillimbury, Ontario East Hawkesbury East Hawkesbury, Ontario East Luther-Grand Valley, Ontario East Mills Township, Ontario East Whitby Township, Ontario East York, Toronto East Zorra-Tavistock East Zorra-Tavistock, Ontario Eastern Ontario Eastnor Township, Ontario Edwardsburgh/Cardinal Edwardsburgh/Cardinal, Ontario Elderslie Township, Ontario Elgin County Elgin County, Ontario Elizabethtown-Kitley Elizabethtown-Kitley, Ontario Elliot Lake, Ontario Emo, Ontario Englehart, Ontario Enniskillen, Ontario Eramosa, Ontario Erin, Ontario Ernestown Township, Ontario Espanola, Ontario Esquesing Township, Ontario Essa, Ontario Essex County, Ontario Essex, Ontario Etobicoke Evanturel Evanturel, Ontario Falconbridge, Ontario Faraday, Ontario Fauquier-Strickland Fauquier-Strickland, Ontario Ferguson Township, Ontario Ferrie Township, Ontario Finch Township, Ontario Fitzroy Township, Ontario Flamborough, Ontario Flos Township, Ontario Foley Township, Ontario Foleyet, Ontario Fort Erie, Ontario Fort Frances, Ontario Fraser Township, Ontario French River, Ontario Front of Yonge Front of Yonge, Ontario Frontenac County Frontenac Islands Frontenac Islands, Ontario Gananoque, Ontario Gardiner Township Garson, Ontario Gauthier, Ontario Georgian Bay, Ontario Georgian Bluffs Georgian Bluffs, Ontario Georgina Township, Ontario Georgina, Ontario Gillies, Ontario Glengarry County, Ontario Gloucester Township, Ontario Goderich, Ontario Golden Horseshoe Gordon, Ontario Gordon/Barrie Island Gore Bay, Ontario Goulbourn Township, Ontario Grand Valley, Ontario Grantham Township, Ontario Grattan Township, Ontario Gravenhurst, Ontario Greater Madawaska Greater Madawaska, Ontario Greater Napanee, Ontario Greenock Township, Ontario Greenstone, Ontario Grenville County, Ontario Grey County Grey Highlands Grey Highlands, Ontario Griffith Township, Ontario Grimsby, Ontario Guelph-Eramosa, Ontario Guelph/Eramosa Gurd Township, Ontario Hagarty Township, Ontario Hagerman Township, Ontario Haliburton County Haliburton County, Ontario Halton County, Ontario Halton Hills, Ontario Hamilton Township, Ontario Hamilton, Ontario Hanmer, Ontario Hanover, Ontario Hardy Township, Ontario Harley, Ontario Harris, Ontario Harrison Township, Ontario Harwich Township, Ontario Hastings County Hastings Highlands Hastings Highlands, Ontario Havelock-Belmont-Methuen Hawkesbury, Ontario Head Township, Ontario Head, Clara and Maria Head, Clara and Maria, Ontario Hearst, Ontario Henvey Township, Ontario Hiawatha First Nation Highlands East, Ontario Hilliard, Ontario Hillier, Ontario Hilton Beach, Ontario Hilton, Ontario Hornepayne Hornepayne, Ontario Horton Township, Ontario Horton, Ontario Houghton Township, Ontario Howard Township, Ontario Howe Island, Ontario Howick, Ontario Howland Township, Ontario Hudson, Ontario Humphrey Township, Ontario Hungerford, Ontario Huntley Township, Ontario Huntsville, Ontario Huron County, Ontario Huron East, Ontario Huron Shores Huron Shores, Ontario Huron Township, Ontario Huron-Kinloss Huron-Kinloss, Ontario Ignace, Ontario Ingersoll, Ontario Innisfil, Ontario Iroquois Falls, Ontario James, Ontario Joan Township, Ontario Jocelyn, Ontario Johnson, Ontario Joly, Ontario Jones Township, Ontario Kapuskasing, Ontario Katrine Township, Ontario Kawartha Lakes, Ontario Kearney, Ontario Kenora District Kenora, Ontario Kenora, Unorganized, Ontario Kent County, Ontario Kenyon Township, Ontario Kerns, Ontario Killaloe, Hagarty and Richards Killaloe, Hagarty and Richards, Ontario Killarney, Ontario Kincardine Township, Ontario Kincardine, Ontario King Township, Ontario King, Ontario Kingston, Ontario Kingsville, Ontario Kinloss Township, Ontario Kirkland Lake, Ontario Kitchener, Ontario Kitley Township, Ontario La Vallee, Ontario LaSalle, Ontario Laird, Ontario Lake of Bays Lake of Bays, Ontario Lake of the Woods, Ontario Lakeshore, Ontario Lambton County Lambton Shores Lambton Shores, Ontario Lanark County Lanark Highlands Lanark Highlands, Ontario Lanark Township, Ontario Lancaster Township, Ontario Larder Lake, Ontario Latchford, Ontario Laurentian Hills, Ontario Laurentian Valley Laurentian Valley, Ontario Laurier Township, Ontario Lavant Township, Ontario Laxton Township, Ontario Leamington, Ontario Leeds County, Ontario Leeds and the Thousand Islands Leeds and the Thousand Islands, Ontario Lennox County, Ontario Lennox and Addington County Levack, Ontario Limerick, Ontario Lincoln County, Ontario Lincoln, Ontario Lindsay Township, Ontario Local government Lochiel Township, Ontario London Township, Ontario London, Ontario Longford Township, Ontario Lount Township, Ontario Loyalist, Ontario Lucan Biddulph Lucan Biddulph, Ontario Lyndoch Township, Ontario Macdonald, Meredith and Aberdeen Additional Machar, Ontario Machin, Ontario Madawaska Valley, Ontario Madoc, Ontario Magnetawan Magnetawan, Ontario Maidstone Township, Ontario Malahide, Ontario Malden Township, Ontario Manitoulin District Manitoulin, Unorganized, West Part, Ontario Manitouwadge Manitouwadge, Ontario Manvers Township, Ontario Mapleton, Ontario Mara Township, Ontario Marathon, Ontario March Township, Ontario Maria Township, Ontario Markham Township, Ontario Markham, Ontario Markstay-Warren Markstay-Warren, Ontario Marlborough Township, Ontario Marmora and Lake Marmora and Lake, Ontario Marter Township, Ontario Marysburgh Township, Ontario Matachewan Matachewan, Ontario Matawatchan Township, Ontario Matilda Township, Ontario Mattawa, Ontario Mattawan, Ontario Mattice-Val Cote, Ontario Mattice-Val Côté McConkey Township, Ontario McDougall, Ontario McGarry, Ontario McKay Township, Ontario McKellar, Ontario McKenzie Township, Ontario McMurrich Township, Ontario McMurrich/Monteith McMurrich/Monteith, Ontario McNab Township, Ontario McNab/Braeside Meaford, Ontario Melancthon, Ontario Merger Merrickville-Wolford, Ontario Mersea Township, Ontario Metropolitan Toronto Middlesex Centre Middlesex Centre, Ontario Middlesex County, Ontario Middleton Township, Ontario Midland, Ontario Milton, Ontario Minden Hills Minden Hills, Ontario Ministry of Municipal Affairs and Housing Minto, Ontario Mississauga, Ontario Mississaugas of Scugog Island First Nation Mississippi Mills, Ontario Mono, Ontario Montague, Ontario Moonbeam, Ontario Moose Point 79, Ontario Moosonee, Ontario Morley, Ontario Morris Township, Ontario Morris-Turnberry Morris-Turnberry, Ontario Moulton Township, Ontario Mountain Township, Ontario Mowat Township, Ontario Mulmur Mulmur, Ontario Mulock Township Munsee-Delaware Nation 1, Ontario Muskoka District Municipality Muskoka Lakes Muskoka Lakes, Ontario Muskoka, Ontario Nairn and Hyman Nairn and Hyman, Ontario Nassagaweya Township, Ontario Neebing Neebing, Ontario Nepean Township, Ontario New Tecumseth, Ontario Newbury, Ontario Newmarket, Ontario Niagara Falls, Ontario Niagara-on-the-Lake, Ontario Nipigon Nipigon, Ontario Nipissing District Nipissing, Ontario Nipissing, Unorganized, North Part, Ontario Nipissing, Unorganized, South Part, Ontario Norfolk County, Ontario North Algona Township, Ontario North Algona Wilberforce North Algona Wilberforce, Ontario North Bay, Ontario North Burgess Township, Ontario North Cayuga Township, Ontario North Crosby Township, Ontario North Dorchester Township, Ontario North Dumfries North Dumfries, Ontario North Dundas, Ontario North Elmsley Township, Ontario North Frontenac North Frontenac, Ontario North Glengarry, Ontario North Gower Township, Ontario North Grenville North Grenville, Ontario North Gwillimbury Township, Ontario North Huron, Ontario North Kawartha North Kawartha, Ontario North Middlesex, Ontario North Perth, Ontario North Sherbrooke Township, Ontario North Shore, Ontario North Stormont North Stormont, Ontario North Walsingham Township, Ontario Northeastern Manitoulin and the Islands Northeastern Ontario Northern Bruce Peninsula Northern Bruce Peninsula, Ontario Northern Ontario Northumberland County, Ontario Northwestern Ontario Norwich, Ontario Oakland Township, Ontario Oakville, Ontario Oil Springs, Ontario Old Toronto Oliver Paipoonge Oliver Paipoonge, Ontario Onaping, Ontario Oneida Nation of the Thames Oneida Township, Ontario Onondaga Township, Ontario Onondaga, Ontario Ontario County, Ontario Opasatika Opasatika, Ontario Orangeville, Ontario Orford Township, Ontario Oro-Medonte Oro-Medonte, Ontario Osborne Township, Ontario Osgoode Township, Ontario Oshawa, Ontario Osnabruck Township, Ontario Osprey, Ontario Otonabee-South Monaghan Owen Sound, Ontario Oxford County, Ontario Oxford, Ontario Pakenham Township, Ontario Papineau-Cameron Papineau-Cameron, Ontario Parry Sound District Parry Sound, Ontario Parry Sound, Unorganized, Centre Part, Ontario Patterson Township, Ontario Peel County, Ontario Pelee, Ontario Pelham Township, Ontario Pelham, Ontario Pembroke Township, Ontario Pembroke, Ontario Penetanguishene, Ontario Percy Township, Ontario Perry, Ontario Perth County, Ontario Perth East, Ontario Perth South, Ontario Perth, Ontario Petawawa Township, Ontario Petawawa, Ontario Peterborough County Peterborough, Ontario Petrolia, Ontario Phyllis Township Pickering Township, Ontario Pickering, Ontario Pickle Lake Pickle Lake, Ontario Picton, Ontario Pittsburgh Township, Ontario Plummer Additional Plummer Additional, Ontario Plympton-Wyoming, Ontario Point Edward, Ontario Population of Canada by province and territory Port Colborne, Ontario Port Hope, Ontario Portal:Canada Portal:Ontario Powassan Powassan, Ontario Prescott County, Ontario Prescott and Russell, Ontario Prescott, Ontario Prince Edward County, Ontario Prince, Ontario Pringle Township, Ontario Proudfoot Township, Ontario Provinces and territories of Canada Puslinch, Ontario Radcliffe Township, Ontario Raglan Township, Ontario Rainham Township, Ontario Rainy River District Rainy River, Ontario Rainy River, Unorganized, Ontario Rama Township, Ontario Ramara Ramara, Ontario Ramsay Township, Ontario Rayside, Ontario Reach Township, Ontario Red Lake, Ontario Red Rock, Ontario Regional Municipality of Durham Regional Municipality of Halton Regional Municipality of Niagara Regional Municipality of Niagara, Ontario Regional Municipality of Peel Regional Municipality of Sudbury Regional Municipality of Waterloo Regional Municipality of York Renfrew County Renfrew, Ontario Richards Township, Ontario Richmond Hill, Ontario Rideau Lakes Rideau Lakes, Ontario Robinson Township, Ontario Rolph Township, Ontario Romney Township, Ontario Ross Township, Ontario Roxborough Township, Ontario Russell County, Ontario Russell, Ontario Ryerson, Ontario Sables-Spanish Rivers Sables-Spanish Rivers, Ontario Saltfleet Township, Ontario Sandwich, Ontario Sarnia, Ontario Saugeen 29, Ontario Saugeen Shores, Ontario Saugeen Township, Ontario Sault Ste. Marie, Ontario Scarborough, Toronto Schreiber, Ontario Scott Township, Ontario Scugog Scugog Township, Ontario Scugog, Ontario Sebastopol Township, Ontario Seguin, Ontario Selwyn, Ontario Seneca Township, Ontario Severn, Ontario Seymour Township, Ontario Shawanaga Township, Ontario Shedden, Algoma District, Ontario Shelburne, Ontario Sherbrooke Township, Ontario Sherwood Township, Ontario Shuniah Shuniah, Ontario Sidney Township, Ontario Simcoe County Sioux Lookout Sioux Lookout, Ontario Sioux Narrows-Nestor Falls Sioux Narrows-Nestor Falls, Ontario Smooth Rock Falls, Ontario Sophiasburgh Township, Ontario South Algona Township, Ontario South Algonquin South Algonquin, Ontario South Bruce Peninsula, Ontario South Bruce, Ontario South Burgess Township, Ontario South Cayuga Township, Ontario South Crosby Township, Ontario South Dumfries Township, Ontario South Dundas, Ontario South Elmsley Township, Ontario South Frontenac South Frontenac, Ontario South Glengarry, Ontario South Himsworth, Ontario South Huron South Huron, Ontario South River, Ontario South Sherbrooke Township, Ontario South Stormont South Stormont, Ontario South Walsingham Township, Ontario South-West Oxford South-West Oxford, Ontario Southern Ontario Southgate, Ontario Southwest Middlesex, Ontario Southwestern Ontario Southwold, Ontario Spanish, Ontario Springwater, Ontario St. Catharines, Ontario St. Charles, Ontario St. Clair, Ontario St. Joseph, Ontario St. Marys, Ontario St. Thomas, Ontario Stafford Township, Ontario Stamford Township, Ontario Statistics Canada Stewart Township, Ontario Stirling-Rawdon Stirling-Rawdon, Ontario Stone Mills Stone Mills, Ontario Stormont County, Ontario Stratford, Ontario Strathcona Township Strathroy-Caradoc Strathroy-Caradoc, Ontario Strathy Township Strong, Ontario Sudbury District Sudbury, Unorganized, North Part, Ontario Sundridge, Ontario Sydenham, Grey County, Ontario Tarbutt Tarbutt, Ontario Tay Valley, Ontario Tay, Ontario Tecumseh, Ontario Tehkummah Tehkummah, Ontario Temagami Temagami, Ontario Temiskaming Shores, Ontario Template talk:Canada topic Template talk:Subdivisions of Ontario Terrace Bay Terrace Bay, Ontario Terry Township, Ontario Thames Centre Thames Centre, Ontario The Archipelago The Archipelago, Ontario The Blue Mountains, Ontario The Nation, Ontario The North Shore, Ontario Thessalon, Ontario Thorah Township, Ontario Thornloe, Ontario Thorold Township, Ontario Thorold, Ontario Thunder Bay District Thunder Bay, Unorganized, Ontario Tilbury East Township, Ontario Tillsonburg, Ontario Timiskaming District Timiskaming, Unorganized, East Part, Ontario Timiskaming, Unorganized, West Part, Ontario Timmins, Ontario Tiny, Ontario Torbolton Township, Ontario Toronto Gore Township, Ontario Toronto Township, Ontario Townsend Township, Ontario Township of Bexley, Ontario Township of Carden, Ontario Township of Eldon, Ontario Township of Emily, Ontario Township of Fenelon, Ontario Township of Manvers, Ontario Township of Mariposa, Ontario Township of Ops, Ontario Township of Somerville, Ontario Township of Verulam, Ontario Tract housing Trafalgar Township, Ontario Trent Hills Trent Hills, Ontario Trent Lakes Tudor and Cashel Tudor and Cashel, Ontario Tuscarora Township, Ontario Tweed, Ontario Tyendinaga Mohawk Territory Tyendinaga, Ontario Unitary authority United Counties of Leeds and Grenville United Counties of Prescott and Russell United Counties of Stormont, Dundas and Glengarry United Townships of Laxton, Digby and Longford, Ontario Uxbridge, Ontario Val Rita-Harty Val Rita-Harty, Ontario Valley East, Ontario Vaughan Township, Ontario Vaughan, Ontario Victoria County, Ontario Visit the main page [z] Wainfleet, Ontario Wallbridge Township, Ontario Walpole Island Walpole Township, Ontario Warwick, Ontario Wasaga Beach, Ontario Waterloo County Waterloo, Ontario Wawa, Ontario Welland County, Ontario Welland, Ontario Wellesley, Ontario Wellington County, Ontario Wellington North, Ontario Wellington, Ontario Wentworth County, Ontario West Elgin, Ontario West Ferris Township, Ontario West Grey West Grey, Ontario West Lincoln West Lincoln, Ontario West Nipissing West Nipissing, Ontario West Nissouri Township, Ontario West Perth, Ontario Westmeath Township, Ontario Westminster Township, Ontario Westport, Ontario Whitby Township, Ontario Whitby, Ontario Whitchurch Township, Ontario Whitchurch-Stouffville, Ontario White River, Ontario Whitestone, Ontario Whitewater Region Whitewater Region, Ontario Wilberforce Township, Ontario Williamsburgh Township, Ontario Wilmot, Ontario Wilson Township, Ontario Winchester Township, Ontario Windham Township, Ontario Windsor, Ontario Wolfe Island, Ontario Wollaston, Ontario Woodhouse Township, Ontario Woodstock, Ontario Woolwich, Ontario Wylie Township, Ontario Yarmouth Township, Ontario York County, Ontario York Region York, Toronto Zone Township, Ontario Zorra Zorra, Ontario

How cra audit support in Ontario fits into our Canada-wide practice

This Ontario hub is part of the BOMCAS Canada national CRA Audit Support practice. For the full national scope of work, deliverables, and credentials, visit our Canada-wide CRA Audit Support service page. For the Ontario-wide tax environment, see the Ontario location hub. For every other service we offer to Ontario businesses, browse the complete services index.

Get CRA Audit Defense in Ontario

Call a BOMCAS Canada cra audit support accountant for Ontario — same-day callback during business hours.

Call 780-667-5250 — CRA Audit Support in Ontario Request a CRA Audit Support Consultation