An incorrect number was used to identify yourself to the IRS, such as an incorrect prior-year AGI, or identity theft PIN issues. (IND-181-01, IND-180.01, IND-996, IND-183-01).
When a return is rejected a message is generated with the rejected data and how to fix it. In most cases, it's no big deal. You can just correct the problem and refile your return.
