How many years do I have to claim an income tax refund, homestead property tax credit or home heating credit for a prior year?
You have four years from the due date of the original return to claim an income tax refund or homestead property tax credit.
A home heating credit claim must be filed by September 30th of the year following the year of the claim.
For example, a home heating credit claim for the tax year 2016 is due by September 30, 2017. No extension or amendment is allowed on the home heating credit. If the home heating credit claim is filed after September 30th, the credit will be denied.