If you need to make a change to any return you have sent us, do not file another return for that year. Wait until you receive your notice of assessment before requesting any change to a return. You can only request a change to a return for a tax year ending in any of the 10 previous calendar years. For example, a request made in 2013 must relate to the 2003 or a later tax year to be considered.
You can make changes yourself to your return online. To access our electronic service, log on to My Account and select the Change my return option. Enter and submit any changes to your most recent return, or to your returns of the previous two years.
To change your address, see How to change your address.
Send both of the following to your tax centreseparately from your return:
The CRA processes most adjustment requests received electronically within two weeks, and most of those received by mail within eight weeks. However, it may take longer if any of the following situations apply:
When we complete our review of your adjustment request, we will send you a notice of reassessment showing any changes to your return and a letter of explanation if we did not accept the changes you requested or the changes were not required.
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