re: Canadian tax withheld from foreign pension and what to enter as taxable in 2A
Taxable 2A income has nothing to do with the taxes you paid in Canada.
if you have made own contributions with AFTER Tax money into the pension, then a portion of the income is considered non-taxable, and that reduces amount goes into 2A, typically your own contributions are mentioned on 1099-R in different field. The formulary to determine how much is taxable is called Simplified Method and a bit complex. If you did NOT make any own pension contributions with after tax funds, then usually all income from Box1 is taxable and entered into 2A ....
I am NOT a tax professional, just have some experience as tax prep volunteer
