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.
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).
