Yes, a 401(k) contribution would qualify (see Retirement Savings Contribution Credit (Saver’s Credit) for more information) and it would be listed on your Form W2 in box 12 with a code D. However, TurboTax will automatically pull this amount from your W2 when it is coded property with a code D into the Savers Credit section of TurboTax, so don't enter it again. TurboTax will warn you of this when going through those screens.
