The IRS has not yet finalized all the forms necessary for filing your 2020 Tax return. When the forms are finalized, possibly by the end of January, then TurboTax will update it's electronic forms and you will be able to file. There is nothing that you need to do other than to wait for the forms to be updated.
In any event, you should not be in too much of a hurry to file. And you can't file until the IRS opens filing on Jan 27, 2021 anyway. Please be patient. Don't be in a hurry. Most people who file early have to amend later. And you can't file until you get all your W2s and 1099 forms, which might not come until the end of January.
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