Q. Does this shed more light on what to do with box 4?
A. Not that I can answer with any confidence.
I don't think it effects your last year's return. But, that amount, $2840.50, may be included in box 1 of your 2020 1098-T. If you used that amount on last year's return, you'll need need to reduce box 1 when you enter in TT.
