Can i change information if i havnt mailed the return in yet

[mesquitebean]

As long as your return is still unfiled (not efiled and not mailed), you can reopen the return to make any corrections prior to actually mailing or efiling. 

• Log in and go to your 2016 Tax Timeline.
• If TurboTax thinks you are finished, there will be no orange "Take me to my return" button.
• So in that case, scroll down to "Some things you can do."
• Choose "Add a State."  (you don't really add one; that's just to get the return to open up.)
• Once the return is open, you can resume working on your return to make any corrections.
• Then go through the REVIEW tab to be sure all is still in order.
• Then go through the FILE tab to choose a filing method, etc.
  
• If filing by mail, it should prompt you to print the return and filing instructions.
  
• If efiling, be sure you go all the way to the end to the final screen and click the button "Transmit Returns Now".
  
  

NOTE:  Do NOT use this method to open a return to make changes/edits to an already-filed return (one that has actually been mailed or efiled.)   If you later need to make changes to an already-filed return, you have to go through the formal amending process, and your return must start off exactly as originally filed.