Click on Federal on the left side of the screen.  Click on Wages and Income.
If you have not filed the tax return then you can change anything on your tax return before filing

If your tax return has been accepted by the IRS then you will need to wait until it is processed and file an amended return to add additional income.

Please click the link below for directions on preparing an amended return.

https://ttlc.intuit.com/replies/3288565

Note: You must mail your amended return. This type of return is not eligible for e-filing.