If this contribution was made through your employer and appears with code W in box 12 of your W-2, on the did your employer tell you about any other contributions page, answer Yes, then enter the amount in the first box labeled Employer and payroll contributions made in 2020 for tax year 2019. This amount should have been reported on your 2019 Form 8889 in a similar fashion by entering the amount in the second box and that same page in 2019 TurboTax.
If this was instead a personal contribution for 2019 not made through your employer, this should have been entered into 2019 TurboTax and not in 2020 TurboTax.
