You may have multiple copies of the same W-2 so review your W-2s to determine if they are the same data from only one employer. If this is the case, you don't have to take any further action. Multiple copies of the same W-2 are issued in case you file paper copies of your federal and state returns and you will need the extra W-2s for the different filings.
If you have four W-2s from four different employers and you have not filed your return, you need to add the additional data from the remaining W-2s before your file. Open TurboTax, go to the income screen, and select the W-2 entry option. Read the instructions to add more W-2 data.
If you have already electronically filed your tax return, you will need to prepare an amended return to report the additional income. You need to wait until the IRS has processed your original return and issued your refund if you received a refund. That will take around 2-4 weeks from the date your filed the return.
You can prepare an amended return with TurboTax but it is a little more involved. You may want to request some support to create the amended return.
Good Luck.
