Change your tax return

You can request a change to your tax return if:

• you received a notice of assessment for the return you’d like to change
• you filed the return within the last 10 years

Other conditions may apply depending on how you request the changes. See below for specific conditions.

How to change your return

Online:

ReFILE

You can use ReFILE if you filed your return electronically.

For tax years 2018, 2017, 2016

• If you filed your return yourself using certified NETFILE software, you can change your return with the same software.
• If a tax professional filed your return using EFILE certified software, they can change your return using the same program.

For tax year 2015 and earlier

• You can’t change your 2015 tax year return yourself.
• If a tax professional filed your return using EFILE certified software, they can change your return using the same program.

For information about this service, go to ReFILE.

My Account

Sign in to Change my return (CMR) within My Account to request a change to specific lines on your tax return.

Sign in to My Account Register

You can also change, your marital status, address, direct deposit information, and your e-mail address using My Account.

Some changes cannot be done in My Account.

Review My Account conditions

You cannot use My Account to change the following:

• a tax return that has not been assessed
• a tax return that has already been reassessed 9 times
• a bankruptcy return, or a return for the year before bankruptcy
• carryback amounts, such as capital or non-capital losses
• a return of an international or non-resident client (including deemed residents of Canada, newcomers to Canada, and individuals who left Canada during the year)
• the elected split-pension amount
• a return where you have income from a business outside your province or territory of residence (you have to complete Form T2203)
• a return that was arbitrarily filed by the CRA under subsection 152(7)

Make your change by mail if any of these apply.

If you change your return online, keep your receipts and supporting documents for 6 years. Don’t send them to the CRA unless we ask you to.

By mail:

To change your tax return by mail, send the following items to your tax centre:

• a completed Form T1-ADJ, T1 Adjustment Request
• all supporting documents, including those for the original assessment, unless you have already sent them to the CRA

If you want change more than one return, send each request separately.

Changes may take 2 weeks online, 8 weeks by mail

We try to meet the timeframes above. However, some change requests are complex and take longer to process.

Situations that can affect timeframes

Processing a complex change request may take longer when it is:

• missing required information or documents
• an adjustment to more than one tax return, or from more than 3 years ago
• for a bankruptcy return
• related to a deceased taxpayer
• related to a carryback amount, such as capital or non-capital losses
• related to an international or non-resident client
• for the elected split-pension amount

For more information see CRA service standards.

We will contact you after processing your request

After we have processed your request, we’ll send you one of the following:

• A notice of reassessment that shows any changes we made
• A letter that explains why we didn’t make any changes