There is currently no information on when the IRS will issue instructions on exempting 2020 unemployment compensation from federal tax.
As soon as the IRS issues instructions on how to report newly-exempt 2020 unemployment payments, TurboTax will make the necessary updates to its programs. Until those changes are made, you have two options:
1. File now and amend your return later, after updates have been made.
2. File after IRS instructions are released and the programs have been updated.