Since it shows here you are using TurboTax Federal Free Online Edition, it should walk you through each step. For example, after you follow the get started directions and finish entering all of your Personal Information, and hit Continue. After this is the Federal section where you will be prompted to start by entering your income, such as your W-2(s). If you need to go back and add your W-2, and you haven't filed, please follow the instructions below.
If you have filed, I have included amending instructions.
https://ttlc.intuit.com/replies/4712124
Easy Navigation in TurboTax Online editions
If
you just need to check what you have done, correct an entry, or just
easily navigate, I’ve included more detailed information, and steps
below.
NOTE : You must be logged into your tax return to see the “tools” option under your account.
Click on My Account. Then click on Tools.
Click on Topic List. This will show you were you have been/what you have done.
Use
Topic Search to find a form to edit etc. by typing into the search box
within Topic Search. It is located in the Tools section where you also
find Topic List.
How to amend a return
You Must Paper File an amendment, per the IRS you cannot E-file an Amended Return
- Before paper filing your amended return make sure the original has been accepted First.
- If your return is Rejected you wont amend it, you will fix and file it again.
Please use the following instructions for filing an amendment with TurboTax
https://ttlc.intuit.com/replies/3288565
