Because the IRS has not finalized the form 7202 and instructions.
The form is estimated to be available on 01/28/2021 (subject to change)
Go to this website for IRS forms availability - https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_online_individual.html
Since Form 7202-S is unsupported, you have to print and mail your return. You can't e-file.
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