Business & farm

From the IRS link above :

 

How individuals can repay the deferred taxes

Individuals can pay the deferred amount any time on or before the due date. They:

Individuals making deferred Social Security tax payments in EFTPS should select 1040 US Individual Income Tax Returns and deferred Social Security tax for the type of payment. They must apply the payment to the 2020 tax year where they deferred the payment. Taxpayers can visit EFTPS.gov for details.

Those using Direct Pay should select the reason for payment "balance due." If they are using the Card Program to pay with a debit or credit card, they should select "installment agreement." They should apply the payment to the 2020 tax year where the payment was deferred.