If you have another form that you received for income earned, such as a W-2 or a 1099-MISC, you can enter this information into your return in the Wages and Income section of TurboTax.
All of your information will be entered into the different sections of TurboTax, and then the program will combine all of this information into one document which will be sent to the IRS and state agencies at the very end.
If you
have already submitted your return: if
it gets rejected then you can
go in and make the necessary changes. If it is accepted, you will need to amend your return after you have
received your refund. The FAQ below will take you to a guide with the
instructions on how to amend.
https://ttlc.intuit.com/replies/7276605