easily is a relative term. you would need to enter sufficient data so the TT return has exactly the same numbers as on the filed return. then you can "amend" the TT one. so if you have a simple return the w-2 change shouldn't be too difficult or time consuming. however, if it was the preparer that made the mistake you should go back to them to fix the error (for free). there may also be a TT charge.
