You better go back and refer to the printout of your original return (you did print a copy, right) carefully RESTORE everything you changed so that you have your return back to EXACTLY what it was when you originally filed.
You CANNOT e-file a amended return. The IRS requires that form 1040-X amended return be printed and mailed.
Perhaps some terminology/definitions
would be in order:
AMEND:-
your return is what you do AFTER your return has been
filed and accepted by the IRS and/or state. (No additional charge)
CHANGE:- your return is what you do BEFORE your return has been
filed --simply go back to the respective information and change it as
needed.
CORRECT:-
your return is what you do AFTER you attempted to file
your return and it is rejected by either IRS, or state --again, simply go
back to the respective information and change it as needed.
Above all DO NOT DO
ANYTHING until you find out if your return is rejected or accepted.
NOTE: When mailing
a printed return it is always a good idea to go to the Post Office and mail
it 'Certified' with 'Return Receipt'. That way you will have proof that
they received it and when it was received.