If you have already filed your return you have the option to "recall" your filed tax return if you sign up today.
If you want to review and update your 2020 return, please enter your information here by February 6, to have your 2020 tax return sent back to you. You will then receive an email from TurboTax on February 8, letting you know that your return is available and providing you with detailed instructions on how to review, update and re-file your tax return.
Other than that you will need to wait and see if your return gets accepted or rejected. Please be aware that the IRS currently won't start processing returns until February 12, 2021.