Can you apply an expected refund from a 2020 addendum that has not yet been paid from the IRS? I am owed $2100 from 2020, and want to use that with 2021's amount due.

My addendum from 2020 was received in June, but has not yet been refunded.  When I check the IRS site there is no information regarding when this refund will be processed.  I owe in 2021, and I would like to use this expected refund to pay what I owe in 2021.  Is this possible in Turbo Tax?