Individual Income (1041) Individual - Extended Income Tax Return for Trusts and Estates (Form 1041) due

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Individual Income (4070) Individual - Employee tip report (Form 4070) to employer due

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Individual Income (1040EZ) Individual - Extended Individual Income Tax Return (Form 1040EZ) due

Individual Income (1040A) Individual - Extended Individual Income Tax Return (Form 1040A) due

Pass-Through Income (IL-1065) Illinois: Business - Extended Partnership Replacement Tax Return (Form IL-1065) due

Employment (Monthly Employment Deposit) Business - Monthly depositors must deposit employment taxes for payments in previous month

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Sales & Use (ST-1) Illinois: Business - Monthly filers required to file Form ST-1 for sales and use tax collected in September

Sales & Use (ST-1) Illinois: Business - Quarterly filers required to file Form ST-1 for sales and use tax collected in the 3rd quarter

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Employment (FUTA) Business - Federal unemployment tax (FUTA) payment due

Employment (941) Business - Employer's Quarterly Federal Tax Return (Form 941) for 3rd quarter due, or additional 10 days if taxes were deposited in full and on time for the quarter

Employment (UI-3/40) Illinois: Business - Employers required to file Form UI-3/40 for unemployment compensation contributions due for the 3rd quarter

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (W/Th/F) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes

Employment (Semi-weekly Employment Deposit) Illinois: Business - Semi-weekly depositors (S/S/M/T) must deposit employment taxes