The HSA contribution made through your employer must be entered. You would normally do this by entering the W-2, but entering a W-2 with a blank box 1 will prevent you from e-filing. You can avoid entering this W-2 by in the HSA section instead telling TurboTax that your employer told you about other contributions and indicating the amount contributed by your employer for 2021 not reported on a W-2. Doing so will produce the same result on Form 8889 that you would get by entering the W-2.
