The IRS has not yet finalized the calculations for the 2nd stimulus reported on the federal tax return, Form 1040 Line 30.
Until the IRS finalizes the Form 1040, TurboTax cannot provide any calculations for the 2nd stimulus in their software.
Website for IRS forms availability - https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_windows_individual.htm...
