The return cannot be changed at this time, and you should wait until the return is either accepted or rejected. If your return is rejected, you will be able to modify it before you resubmit.
If your return is accepted, you can amend or correct your return if there is a missing W-2. You will want to wait until your original return is processed. Sometimes the IRS makes adjustments there, and you do not want two versions of your return in process at the same time. There is no additional charge to use Turbo Tax to amend your federal or state return.
Below is a Turbo Tax FAQ with step-by-step instructions to amend.
https://ttlc.intuit.com/community/amending/help/how-to-amend-change-or-correct-a-return-you-already-...
Tax year 2021 federal amend form should be available by Feb 24th, and you can check that at this list of IRS forms and dates. IRS Forms Available Estimates
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