The only way to file an amended tax return is to prepare a 1040X and print, sign. and mail it. If you did something else, like try to e-file a change, the changes were NOT TRANSMITTED.
You can amend a tax return after it has been fully processed and you have received your refund. You must work from your return exactly as it was when you first filed it. If you changed anything, change it back to the way it was when you originally filed it, before you follow the steps to amend. Follow the TT instructions to amend a tax return:
Wait about 3 weeks and you can check the status of your amended return:
It will take about 3-4 months for the IRS to process an amended return.