If you've already filed, you need to wait to see if the your tax return is accepted by the IRS. They have announced that they will begin accepting tax returns on January 28. So, there is a possibility that your return could be rejected for some reason. If so, you will be able to add the additional W-2, correct whatever caused your return to be rejected, and re-file. If your return is accepted, you will need to file an amended return to add your additional W-2. The TurboTax Amend function will be available some time in February.
