Form4BL: Form4BL (2025)
Wisconsin · Wisconsin DOR · Used for tax years 2025
Wisconsin Form 4BL tracks net business loss carryforwards for separate entity corporations. It reports losses, income, losses used or expired, and remaining losses available by year, and is filed with Wisconsin Form 4.
Who files this form
The 2025 Wisconsin Form 4BL is for separate entity corporations reporting a Wisconsin net business loss carryforward. The form says to file it with Wisconsin Form 4.
What you'll need
Have the information requested on the form ready:
- Corporation name and Federal Employer ID Number.
- Loss and income for each listed tax year.
- Loss used or expired for each listed tax year.
- The years in which the used or expired losses were incurred.
- Remaining loss available.
The form lists tax years 1995 through 2024.
How to file
File the 2025 Form 4BL with Wisconsin Form 4. The provided form text does not give a mailing address or e-filing directions.
Questions people ask
What is Form 4BL for?
It reports Wisconsin net business loss carryforwards for separate entity corporations.
Which tax years are listed on the 2025 form?
The form has rows for tax years 1995 through 2024.
Where do I report losses that were used or expired?
Column (d) is for losses used or expired for the tax year in column (a). Column (e) identifies the years in which those losses were incurred.
Where do I report the remaining loss available?
Use column (f), labeled “Remaining Loss Available.”