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I left Canada in 2023 and mistakenly filed my tax return for that year as a non-resident. In hindsight, I should have filed as a resident (emigrant) and included my date of departure in the return. I only became aware of this error recently.

I contacted the CRA to inquire about the status of my GST/HST credit. I was asked to provide an update on my world income, which I submitted via the RC151 form. This form includes my departure date from Canada; however, its processing time is approximately 14 weeks. The CRA agent informed me that they were unable to manually update my world income due to a discrepancy with the departure date in their system. They advised that the departure date must first be corrected in my 2023 return through a T1 Adjustment Request form, which currently has a processing time of 50 weeks.

Given this situation, I’m uncertain whether I should wait for the RC151 form to be processed so that my departure date is updated in the system, or proceed with submitting a T1 Adjustment Request now to correct the 2023 return.