Deductions & credits

I came across the exact same issue like @Sky Mile  pointed out.

The situation is that I have some foreign tax credit initially occurred in 2019 (as a one off), and expected to carry over to 2020 and 2021, because I have constant foreign incomes.

- In 2019, foreign taxes paid is 14,929, utilized foreign tax credit is 5,370, carryover is 9,559

- In 2020, no new foreign tax paid (because payed as one off on 2019), but just utilized another 2,222 foreign tax credit from the carryover from 2019, and carry over for the next year is -2,222.

- In 2021, supposedly the carryover to 2021 is 9,559 + (-2,222)=7337  

The above all seems all make sense, however, TT returns error message "Incoming C/O utilized should not reduce the foreign taxes below 0".

@MarilynG1 , thank you for your advice to "Sky Mile"'s question 2 weeks ago, however, although you mentioned is making sense, however for the TT UI, it only allows us to input as the below fields. I think with the below UI, seems we are not able to input any ideal inputs to make it makes sense like you advised, right? (Because if i manually adjusted carryover for 2020 as 7,337, that would imply there is some new foreign tax occurred on 2020 as 9,559 (=7,337+2,222), but actually that's not the case.)

Your further advice is much appreciated, thanks a lot!