You can log back into your account to make changes anytime prior to filing your return. If you have already e-filed (or mailed) your return, you will need to wait until your return is either accepted or rejected to make changes.
- Click Tax Home on the left-hand menu.
- Click Federal (or State) and you can navigate through the different sections of your return using the top menu links (Personal, Deductions and Credits, etc).
Please click this TurboTax Help link to learn more.