Reject Code IND-181-01 is an error code that may appear when filing your tax return electronically. This code indicates that there is an issue with the taxpayer identification number (TIN) of a dependent listed on your return. Specifically, it means that the TIN you have entered for your dependent does not match the information in the IRS database.

To resolve this issue, you can follow the steps below:

1. Verify the information you entered for your dependent. Make sure that you have entered their correct TIN and that you have not made any typos. You can double-check their TIN by looking at their Social Security card or other official documents.

2. If you have confirmed that the TIN you entered is correct, contact the Social Security Administration (SSA) to ensure that their records match the TIN you have entered. You can contact the SSA by calling their toll-free number at 1-800-772-1213 or by visiting your local SSA office.

3. If you discover that you have entered an incorrect TIN for your dependent, correct the information on your tax return and re-file it electronically. You can do this through your tax preparation software or by working with a tax professional.

4. If you are unable to resolve the issue using the steps above, you may need to file your tax return on paper and attach a statement explaining the issue with the dependent's TIN. You should also attach any supporting documents, such as a copy of the dependent's Social Security card.