You can get an extra 180 days to file your Vermont property tax without penalty, fee or interest if you served in a combat zone, were called to full-time active duty from a reserve component because of a conflict in a combat zone, or were hospitalized for injuries from that service. Your town has to approve the extension.
Contact the town clerk in the town where your property is located and ask for the instructions to request this exemption. This is approved by the municipality, not by the state, so going to the Vermont Department of Taxes first will not get it granted.
Your orders, or medical paperwork if you were hospitalized, showing the qualifying service and when it ended.