VERIFIED OFFICIAL SOURCE

Canada Revenue Agency - Changing a tax return

canada.ca

Used by2 published procedures

Last checked2026-09-28

Source domaincanada.ca

Official source URLhttps://www.canada.ca/en/services/taxes/income-tax/personal-income-tax/after-you-file/change-return.html

CONNECTED GUIDES

Procedures using this source

These Helpydo guides reference this official page as a verification source.

CACanada

How to Claim Eligible Medical Expenses on Your Canadian Tax Return

Claim eligible medical expenses on your 2025 Canadian return using the CRA's 12-month rule. Check receipts, dependants and the difference between lines 33099 and 33199.

CACanada

How to Change a Canadian Tax Return After You Have Already Filed It

If you discover missing income, a deduction, credit, expense or tax slip after filing your Canadian T1 return, wait for your notice of assessment and request an adjustment instead

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