The State of Idaho will automatically grant your business a six-month state income tax extension without you having to file any paperwork.This can be done online using Idaho Business Income Tax e-Filing .

 To avoid a 2% per month penalty, you must pay at least 80% of the total tax due for your current year return (or 100% of the tax reported on the previous year's tax return) by the original filing deadline ― typically March 15th. If you owe more tax but can't file by the due date, use Form 41ES (Estimated Tax Payment/Extension of Time Payment, Idaho Business Income Tax) to request an Idaho filing extension.

For additional information, please visit the Idaho State Tax Commission website .

Print and Mail:
Idaho State Tax Extension Payment Voucher Form 41ES (PDF)

Mail with payment to:
Idaho State Tax Commission
P.O. Box 83784
Boise, ID  83707-3784