So I just got a W2 I forgot about I have to mail in my forms. How can I fix it before I mail them in? It just keeps saying I already printed and filed.

If you need to add a W2 to your tax return, please follow the instructions in the article below to get to the W2 location on your tax return.

How do I change my W-2 info in TurboTax?

If you didn't efile or mail it yet you can go back in and add it.  

If you haven't efiled or mailed your return or it rejected you can go back in and change anything you want.  Do not click on Amend!

Click on Add a State to let you back into your return.

From Tax Home (the first screen you see after you sign in), scroll down to Your tax returns & documents. You may have to select Show to open the drop down.

To change a return If you haven't mailed or efiled yet, see

https://ttlc.intuit.com/community/tax-topics/help/i-want-to-change-a-return-i-ve-printed-but-haven-t-mailed/00/27616