How do I correct my tax info after I already selected e-file

If you have not yet submitted your return for efiling by clicking on the orange submit return button, you can still go back and make changes to it. If you did go ahead and submit your return you will have to wait until it is either accepted or rejected. 

If your return is rejected by the IRS, you can correct the problem and fix the reason for rejection and re-efile your return. If your return is accepted by the IRS, you must prepare, print, sign and mail an amended tax return form 1040X to correct the problem. The 1040X will be available in TurboTax later in February.

DO NOT change your original tax return until you start the amended return. If you have already changed it from the way it was originally filed and accepted, you must change it back before you start the amended return. Wait until you receive the refund from your original return before beginning your amended return to make sure you enter the correct amount. Here is an FAQ to help you:
https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed