Not really ... if you don't finish paying back the entire amount in 2021 you will lose any deduction for the repayment going forward if you repay less than $3000 in a future year. Any repayment in 2021 will be reflected on the 1099-G they issue in January.
And all the withholding that happened in 2021 will be reported on the 2021 return and any excess withholding becomes your refund.
