If you do not receive the second stimulus payment on or before January 15, 2021 and/or you did not receive the first stimulus payment in 2020 and you are eligible it will be entered on your federal tax return, Form 1040 on Line 30.
The Form 1040 has not been finalized and needs to updated to include the 2nd Economic Impact Payment.
There is a possibility that the Form 1040 will be updated on 01/07/2021 to include the 2nd stimulus.
See this TurboTax support FAQ for IRS forms availability - https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_online_individual.html
