File NH BT-EXT
Prepare NH BT-EXT now with e-File.com
E-Filing Options: e-File.com - TaxAct
BT-EXT may be used by taxpayers who need to make an additional payment to their tax return. You do not have to complete NH BT-EXT if the total amount due is zero. New Hampshire BT-EXT must be filed on or before the original due date of your annual tax return.