If you have e-filed, wait until your return is accepted or rejected by the IRS.
If your return is rejected, add the information (along with anything else that needs to be corrected for e-filing) and then re-submit your return.
To add a Form 1098, in the program, simply go to the right upper corner, in the search box, type in 1098 and press Enter, select Jump to 1098 to continue
If your return has been accepted or paper-filed, you cannot add any information. Instead, you have to file an amendment. Click here Amendment
If your original return generates a refund, you should wait until your original refund arrives before you file your amendment Form 1040-X. You can cash your check, but you still should wait until your current tax return is resolved.
