1120 Idaho electronic filing information

State contact information

If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
State Tax Commission
800 Park Blvd., Plaza IV
Boise, ID 83722-0410
Phone
: 208.334.7781

State electronic filing details

Grace period
10 days
E-filing mandate
No
Accepts state-only filings
Yes
Return types accepted
C Corporation
S Corporation
Consolidated / Combined
Amended
Short year, must match federal dates
Composite (part of main return)
Withholding (part of main return)
Estimates (separate from return)
Extension
Return types not accepted
N/A
Accepts returns with these conditions
Refund
Zero balance
Balance due
Direct deposit of refunds
No
Accepted forms of payment
Electronic funds transfer (EFT)
Direct debit (EFW)
Check by mail
Signature requirements
None
Supports PDF attachments
Yes
Tax year(s) supported for e-filing
Current tax year and two prior tax years
Special considerations
N/A

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