INDIANA — As a general rule, you have three years to file an amended return. Reasons for filing an amended return may include reporting additional income, correcting your income or correcting your deductions and credits.
You do not need to amend your return because of a simple math error or if you forgot to attach forms. DOR will contact you if more information is needed.
You can file an amended return electronically. Or file another Form IT-40 with the box on the front page that reads, “place ‘x’ in box if amending” filled in.
If you owe, you can pay through INTIME, DOR’s customer portal. Amounts previously paid should be reported as an estimated payment.
If you get a refund and then find you owe, don’t include any refund already received on the amended return. Instead, DOR will issue either a notice of proposed assessment or a demand for payment that includes the amount of the refund you received.