You would go based on the year that the T2202A was
issued. So if it was issued in 2018, you would put it on your 2018 return. If
it was issued in 2017 then it would go on your 2017 return.
You can make changes after you have filed your tax
return through the CRA or through
ReFILE: https://turbotax.community.intuit.ca/replies/2647992