Nothing goes on line 14b unless you have a code-1 2020 Form 1099-SA (reported on line 14a) and you rolled over some of that distribution. You haven't mentioned any such rollover. (Using this return of contribution to make an HSA contribution for 2021 is not a rollover.)
No changes to your 2020 W-2 or 2020 Form 5498 will be made.
