If we got a 2020 refund and IRS website says owed balance of $0, do we still owe deferred self-employment taxes (CARES act) if sched 3 line 12e lists an amount?

Schedule 3 Line 12e lists $36 and TurboTax sent us an email saying we should have paid 1/2 of that by Dec. 31...but IRS website says we don't owe them any money and we got a refund last year.