No, Your return will show pending until the IRS opens up their e-file system (Feb 12th).  Your return will stay on TurboTax servers until the IRS is accepting returns.  You cannot get it back, & do not make any changes to your return.  The changes would not go through. 

To add:  you will have to wait until your return gets accepted or rejected.  

If your return gets rejected, you can just make the changes you need to do, then you can e-file your return again.  

If your return gets accepted, then once your original return is fully processed, you would have to amend your return to make changes.