The form 116 will be available in TurboTax on 3/3/22.  Once the IRS approves the form then TurboTax has to get the form ready to use with their software.  

You can check the following lists, it will have information when the forms will be available.

IRS forms availability table for TurboTax individual (personal) tax products

https://ttlc.intuit.com/community/forms/help/irs-forms-availability-table-for-turbotax-individual-pe...