Do I have to pay or file if I had no withholding during the quarter?

You do not need to send Form IL-501 if you had 0 (zero) withholding during a month. However, you DO need to file your quarterly Form IL-941 even if you had 0 (zero) withholding during a quarter. On your Form IL-941, enter zero on Lines 2a, 2c, 2d, and Line 2.

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