What if I want to use an Illinois Net Loss Deduction but failed to file the loss year return?

You must file the loss year return within three (3) years of the extended due date of the loss return to carry any NLD to another tax year. If you fail to file the loss year return, the Department will disallow your Net Loss Deduction.

If you have additional inquiries, you may submit them to the Questions, Comments, or Request form.