The importing of a T3 slip is a little buggy if there is a Prior Year “ROC” in Box 42 of the tax return.
Let say you import a T3 slip via AFR and select to import under the name that existed last year. If the T3 Description/slip that was carried forward in the tax return has an amount in Box 42 for Prior years the AFR data won’t populate the slip. You can jump to the slip and there is a yellow diagnostic warning. To clear the warning you can select “use AFR Amount” which populates the slip with the AFR values. Unfortunately, when you do this, it over-writes Box 42 (prior year ROC) with 0.00 and then you get a Yellow diagnostic on that field that says “slip has a prior year value but no current year value”. You lose the prior year amount because it gets over-written with a zero.
Since an actual T3 slip will only ever include a current year ROC in Box 42 and never an amount for prior years accumulated ROC I guess the solution to this would be to have AFR ignore the amount for “Box 42 - prior years” and DO NOT over-write that carried forward amount during the AFR import process. Sort of the way the AFR Import doesn’t over-write the Issuer Name on a T3 or T5 if a name already exists, you could have it so that it doesn’t over-write that box 42-Prior Year if an amount already exists in that field.