An Overview of Idaho State Personal Income Tax Extension Forms

- Updated February 21, 2022 - 8.00 AM by Admin, ExpressExtension

Does Idaho support tax extension for personal income tax return?


Yes, The state of Idaho supports the automatic extension of time to file personal income tax Form-40.

What Form does the state of Idaho require to apply for an extension?


There is no state-specific form to request an extension, as the state of Idaho automatically provides the extension for up to 6 months for individuals to file an income tax return
with the state.

How do I pay my balance due to the state of Idaho?


If you owe Idaho state taxes, you must pay the tax due by the regular due date. Otherwise, you will be charged with penalties and interests.

To make a payment with the state, use Payment Voucher (Form 51).

You may also pay your tax due with a check, money order, credit card, E-Check, or ACH Debit or mailing the payment voucher.

When is the due date to file personal tax Form 40 with Idaho?


Idaho personal tax filings are due by May 17, or by the 15th day of the 4th month following the end of the taxable year for fiscal year filers.

Although the state gives you an automatic 6-month extension to file your return, the interest is still applicable for late filing.

Where to mail payment Form 51?


Mail the check with the payment voucher to the following address:

Idaho State Tax Commission
PO Box 83784
Boise ID 83707-3784