Organize the year before entering amounts
Use a checklist with the issuer, tax year, document type and status: expected, received, amended or cancelled. Keep the prior assessment and filed return available, but do not assume last year’s documents describe this year’s circumstances.
A move, retirement, leave period or change of department can change the records you expect. Add bank interest, investment activity and other income sources even when they do not appear in the federal pay system. A complete list helps identify a missing document before preparation is nearly finished.
Worked example: employment followed by retirement
Suppose a hypothetical Ottawa resident’s records show $47,500 of employment income, $18,200 of pension income and $360 of bank interest for 2025. The three-source total is $66,060 before other items and adjustments. The checklist also records the tax withheld on the relevant slips.
If the employment slip is later replaced with one showing $46,900, the difference is $600. The current three-source total would be $65,460, subject to the full review. The replacement is not an additional $46,900 of employment income.
Keep supporting claims and changes together
Retain relevant donation, medical, childcare, tuition and registered-account documents for eligibility review, rather than assuming every receipt produces the same tax benefit. Include important family and residence changes. A statement of an amount paid is only part of the evidence behind a claim.
Federal pay guidance explains where current and former employees can obtain slips and how amended documents are identified. Use the issuer’s current channels, keep document versions and ask about an unexplained slip rather than altering it yourself.
Choose the next step for 2025
As of September 6, 2026, the ordinary April 30 filing and payment deadline for 2025 has passed. If the return remains unfiled, identify that year for preparation. If it has been assessed and new information changes it, review the correction process instead.
Before submission, confirm the filing arrangement and review the return’s material figures. Keep the completed return, approval and submission evidence together. That makes a later assessment or amended-slip question much easier to understand without reconstructing the entire intake.
Put this into practice
Sources and current guidance
A practical next step
Bring the records you have.
We can identify missing documents, agree on the scope and organize the next tax preparation step.
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