Once the tax return has been filed it cannot retrieved or changed.
If the IRS rejects the tax return you can make additions or changes and e-file again.
If the IRS accepts the tax return then you will have to wait for the IRS to process the return and send the tax refund or the taxes owed have been paid. Then you will have to amend the tax return to add the W-2.
See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
