Personal Tax Return Filing for 2018
T1 tax returns and T1135 filing for 2018 will start from Monday, February 18, 2019, at 8:30 a.m. (Eastern Time). Any prior year filing (i.e., for 2015, 2016, 2017) including T1 Amendments must be completed before 11:59 p.m. local time on Friday, January 25, 2019. During this period CRA’s EFILE and ReFILE services will stop transmission of return in order to convert its system to prepare for the next filing season.
Amending Personal Return T1
When to amend your T1 Return?
You can amend your return when you discover any mistakes or omission on your original filed return which resulted in either an increase or decrease in the amount of tax payable.
CRA’s preferred method
Write a letter/message to the Tax Center where you filed your tax return with the changes in the tax return along with explanation and documents such as T3, T4A, T3, T5 etc. CRA also prefers that you include the T1-ADJ form along with the documents and an explanation.
Alternatively, file the adjustment through my CRA Account for the current year and the last 10 years.