Who files Form T400A?

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Answer

Taxpayers who disagree with a Canadian assessment, including residency determinations and foreign-reporting penalties. The obligation is decided by facts rather than by tax owing, which is why a nil position does not remove it.

The rule on who files

Taxpayers who disagree with a Canadian assessment, including residency determinations and foreign-reporting penalties.

The firm’s founder at his desk in the Delhi office

The exception worth knowing

The deadline is the whole ball game: file within it and the assessment is under objection, miss it and the only routes left are an extension application or relief. Objecting also changes collection, which matters when the amount is large.

Who files Form T400A?
ItemAmount
Years unfiled4
Forms due per year2
Assumed penalty per formUS$8,000
Exposure before any reliefUS$64,000
Tax actually owed on the incomeUS$0

US$64,000 of exposure against nil tax. That asymmetry is why the disclosure routes exist and why the sequence of filings matters more than the arithmetic — filed in the right order under the right route, the penalty position can be very different from this.

Treat these numbers as a worked example rather than advice — they exist to make the mechanics visible, and the rates and thresholds are assumed for the illustration. For a real filing, we verify each figure with the authority that publishes it, for your year.

Where to go from here

The full treatment — who it binds, the deadline, the penalty and the fixed fee — is on T400A — notice of objection. The quote comes before the work, in writing.

Reviewed against current guidance for the 2025 and 2026 filing seasons by Udit Gupta, Cross-Border Tax Expert, Legal Quotient Consultants. General information, not advice for your circumstances — call our 24-hour helpline to discuss your own position.

Who has to file US tax return — what this page covers

This is the page to read on who has to file US tax return. It takes Form T400A in order — the test that decides who is affected, the returns and forms that follow from it, and a fee quoted in writing before anything starts.

Cross-border situations we are engaged for

Case study 1

Objecting to a residency determination for a year spent abroad

The agency had assessed a client as resident for a year they had spent working outside Canada. The objection was filed inside the deadline and its substance was factual rather than legal: where the family lived, what was kept and what was given up, which country the client filed in and on what basis, and the dates of every entry and departure. The material went in as a schedule with the supporting documents indexed to it. The engagement produced a documented residency position for that year and a record the client can reuse for the years either side of it.

Read how this one runs
Case study 2

Foreign reporting penalty objected on the filing history

A penalty had been charged on a foreign-reporting form for a year in which the client owed nothing. Rather than argue that the charge was unfair, the objection set out the filing history: what had been filed and on what dates, what the client had been told about the requirement and by whom, and what they did in the period after they learned of it. That is a narrower argument and an evidenced one. The engagement produced a filed objection with a documented chronology, and a client who knew for the first time which years were exposed.

Read how this one runs
Case study 3

Assessment arrived late at an address the client had left

A notice had gone to a Canadian address the client vacated after moving abroad, and reached them well after the objection period. An ordinary objection would have been answered on timing, so we applied to extend the time instead, and built the application on postal evidence: the change of address, the forwarding arrangement, the date the envelope was actually opened, and the steps taken in the days after. The work here was the explanation for lateness. The merits were summarised only far enough to show the objection was worth hearing.

Read how this one runs
Case study 4

Two years, one still open and one already closed

A client arrived with correspondence covering consecutive years and wanted all of it disputed. Only one year was still inside the objection period. Sorting that out was the first job: date each notice, fix the period for each year, and decide what instrument each year could still use. The open year went to objection on the merits. The closed year went another way, because arguing the merits of a year nobody will hear is wasted work. The client received a written map of which year was on which route and why.

Read how this one runs
Case study 5

Confirming the collection position before the objection went in

The amount assessed was large enough that the client's first question was not about the merits but about what would be collected while the dispute ran. We filed the objection inside the deadline and then put the collection question in writing, so the answer sat on the file rather than in somebody's recollection of a telephone call. The engagement produced two things: an objection on the substance of the assessment, and a documented understanding of how the balance would be treated while that assessment was under objection.

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Case study 6

When the assessment was right and the objection was not the tool

A client wanted to object because a credit they were entitled to had been left off their own return. The assessment reflected what had been filed, so there was nothing in it to dispute; the figures were the client's, not the agency's. An objection would have been an expensive way to be told that. The credit was pursued through the correction route instead, and the objection period for the year was diarised in case the corrected figures were not accepted. The engagement produced the correction and a written record of the fallback.

Read how this one runs
Case study 7

An IRS Notice for a Year the Client Believed Was Settled

Most notices are proposals rather than assessments, and they carry a response window that is shorter than it looks. The engagement reads what is actually being proposed, gathers the support, and replies inside the window with the position rather than a request for time.

Read how this one runs
Case study 8

Leaving Canada — the Bill You Get for Assets You Still Own

Emigrating triggers a deemed disposition of most holdings, which produces tax on gains never realised in cash. The file values the property, identifies what is excluded, and looks at whether security can be posted rather than the tax paid outright.

Read how this one runs

All case studies — every published engagement in one place.

Core International & Cross-Border Tax Services

International Tax Planning & Advisory

Strategy and compliance for income, assets and families spread across borders.

One coordinating team: filings on every side of the border are sequenced so treaty relief and foreign tax credits are claimed once — and in the right country.

U.S. & Cross-Border Tax Returns

Dual filers: U.S. citizens in Canada and Canadians with U.S. income run two parallel systems — we prepare both, in the right order, every year.

Expat & Emigration Tax

The move year is its own project: the elections and valuations filed that year decide the next decade of both countries’ returns.

Non-Resident Canadian Tax

Default withholding is 25% of gross: elective returns routinely turn over-withheld rent and pensions into refunds.

Transfer Pricing & BEPS

Documentation prepared with the return is the cheapest insurance in international tax; reconstructing it during an audit is the most expensive.

Cross-Border Estates & Trusts

Wills drafted for one country routinely misfire in the other — deemed disposition here, estate tax there, credits in between.

Cross-Border Corporate Tax

Expansion raises the same four questions every time — entity, PE, repatriation, payroll. We answer them before the tax authorities do.

India Tax for NRIs & Returning Residents

The deduction is taken on the sale price, not the gain — which is why an NRI property sale strands cash unless the certificate is applied for before closing.

Canadian Tax with a Foreign Element

Residency is decided on facts, not on a form — and the year you arrive or leave is the one where the largest amounts turn on the smallest details.

UAE Tax for Expats & Their Home Country

A zero-tax country is only half the answer — the question that decides the bill is whether the country you came from still treats you as resident.

Industries & Client Types We Serve Worldwide

Global E-commerce & Marketplaces
Technology & SaaS
Professional Services Firms
Cross-Border Real Estate
Importers, Exporters & Manufacturers
Athletes, Artists & Entertainers
Remote Workers & Digital Nomads
Investment Funds & Holding Companies

Global E-commerce & Marketplaces

  • Foreign VAT / GST / sales tax registrations
  • Marketplace withholding reviews
  • Inventory nexus & PE analysis
  • Multi-currency books reconciled
Explore E-commerce & Marketplaces

Technology & SaaS

  • Cross-border revenue sourcing & withholding
  • IP structuring with real substance
  • Equity for cross-border teams
  • U.S. expansion: entity & PE setup
Explore Technology & SaaS

Importers, Exporters & Manufacturers

Related-party purchasing, customs value versus transfer price, and foreign-affiliate structures put trading businesses inside the s.247 documentation rules.

Goods crossing a border move the tax question from income to indirect: registration thresholds, place of supply, the customs value and the transfer price between related entities all have to agree with each other. When they do not, the adjustment arrives from two authorities at once and each one uses the other's number.

  • Transfer pricing documentation (s.247)
  • Customs value vs transfer price
  • Foreign affiliate reporting (T1134)
  • Country-by-country reporting
Explore Trade & Manufacturing

Athletes, Artists & Entertainers

  • Reg 105 & U.S. CWA agreements
  • Multi-state & country calendars
  • Touring income allocation
  • Royalty & image-rights withholding
Explore Athletes & Entertainers

Remote Workers & Digital Nomads

  • Residency analysis before moving
  • Employer payroll exposure
  • Totalization & social security
  • Foreign tax credits
Explore Remote Workers

Investment Funds & Holding Companies

  • Treaty access & PPT reviews
  • FAPI & surplus computations
  • Withholding-efficient routing
  • Governance & substance
Explore Funds & Holdcos

The follow-up questions on Form T400A

Who can file Form T400A?

Any taxpayer who disagrees with a Canadian assessment or reassessment. That is broader than it sounds. It takes in a determination that you were resident for a year you regard as a non-resident year, a penalty charged on a foreign-reporting form, and the ordinary case of income the agency says you had and you say you did not. The form is the formal objection, and filing it is what starts the appeals process rather than continuing a conversation with the assessor. What matters is that you are the person assessed, or acting for them, and that you are inside the objection deadline.

Can I object if my assessment shows no tax owing?

Yes. The right to object attaches to the assessment, not to a balance, and some of the assessments most worth objecting to carry no tax at all: a residency determination, or a penalty on a foreign-reporting form where the income itself produced nothing payable. The exposure here is decided by facts rather than by tax owing, which is why a nil position does not remove it. If you leave a nil assessment unobjected because nothing is payable, you are accepting the finding of fact underneath it, and that finding can matter in the years that follow.

Can a non-resident object to a Canadian assessment?

Yes, and a residency determination is one of the things this objection exists for. Where the agency has assessed you as resident for a year you treat as a non-resident year, the objection is where that is argued, with the facts about ties, presence and intention set out in support of it. Living outside Canada takes nothing away from the right to object. It does not by itself extend the deadline either, which is the practical problem for anyone whose post reaches an overseas address slowly, or reaches an old address first.

What happens if I miss the T400A objection deadline?

The deadline is the whole ball game. Filed inside it, the assessment is under objection and the dispute proceeds on its merits. Miss it and two narrower routes remain: an application to extend the time for objecting, which has to explain why the objection was not made in time, and a request for relief, which can reach penalties and interest but never the tax. So a missed deadline does not always end the matter, but it moves you from arguing about whether the assessment is right to arguing about whether you should be heard at all.

Does filing an objection stop the CRA collecting?

Objecting changes the collection position, and that is the main reason the deadline matters when the amount is large. It is not a blanket stop and it is not uniform, because what happens next depends on the taxpayer and on the type of amount assessed, so it is worth having the answer in writing on your own file rather than assuming it. Two things are worth separating in any case. An assessment under objection sits in a different posture from one that is merely unpaid, and interest continues to accrue on an unpaid balance regardless, so disputing and paying are not alternatives.

Can I object to a foreign reporting penalty?

Yes. Foreign-reporting penalties are one of the assessments this objection is squarely for, and they are worth objecting to precisely because they are charged by reference to the form and the delay rather than to the tax, so the charge can be substantial on a year that produced nothing payable. The objection is where the facts that bear on the charge go: what was filed, when, what the taxpayer knew and when they knew it, and what they did once they knew. That is a different argument from asking for the penalty to be forgiven, and it belongs inside the deadline.

How do families with assets in two countries handle inheritance?

With paperwork built for both systems rather than one. In practice that means wills that work where each asset actually sits, an executor with authority a foreign bank or land registry will accept, clearance certificates before the estate distributes so the executor is not left personally exposed, and an estate tax exposure calculation done while the person is alive and can still act on it. Doing it afterwards costs more and forecloses most of the options. See cross-border wills and trusts.

Is "fund transfer pricing" the same thing as transfer pricing?

No — and if you came here to calculate FTP, this is not it. Fund transfer pricing is a bank's internal allocation of funding costs and benefits between its own business units, a treasury and asset-liability management discipline used to measure branch or product profitability. Tax transfer pricing is about prices between legally separate related parties across borders, and about which country taxes the resulting profit. The words overlap; the fields do not. See our transfer pricing work.

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Where our partners studied — CPA Canada (In-Depth Tax Program), AICPA, the Institute of Chartered Accountants of India and the Malaysian Institute of Accountants.

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