1120 Wisconsin 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.
Wisconsin Department of Revenue
P.O. Box 8949
Madison, WI 53708-8949
Phone
: 608-264-6886

State electronic filing details

E-filing information
Details
Grace period
10 calendar days
E-filing mandate
Yes, all returns
Accepts state-only filings
Yes - Attach the federal XML created for this State (Default). Only Federal e-file validation errors have to be cleared. E-file Reject Diagnostics do not have to be cleared.
Return types accepted
C Corporation
S Corporation
Consolidated
Return types not accepted
Composite
Financial
Estimates
Extensions
Direct deposit of refunds
Yes
Accepted forms of payment
Direct debit (EFW)
Electronic funds transfer (EFT)
Check by mail
Signature requirements
ERO retains signed filing authorization
PIN not allowed as signature
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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