September 2026

​​​​​​​NOTE: If a return due date falls on a scheduled holiday or weekend, returns will be due the next working day.

​September 10

• Legal Process
• Twice-Monthly Income Tax Withholding Return (August 16—August 31 payment)
  

September 15

• Corporation Income Tax/LLET and Pass-through Entity Return and Payment Due (FY ending 5/30)
  
• Estimated Corporation Income Tax/Limited Liability Entity Tax/One Fourth Estimate (FY ending 5/30)
  
• Estimated Corporation Income Tax/Limited Liability Entity Tax/One Fourth Estimate (FY ending 3/31)
  
• Estimated Corporation Income Tax/Limited Liability Entity Tax/One Fourth Estimate (FY ending 12/31)
  
• Estimated Corporation Income Tax/Limited Liability Entity Tax/One Fourth Estimate (FY ending 9/30)
  
• Estimated Tax/Individuals/One Fourth Estimate
• Monthly Income Tax Withholding Return (August payment)
• Motor Vehicle Usage Tax—Loaner/Rental
  
• Nonresident Withholding Tax Return and Payment Due (FY ending 5/30)
  

September 21

• Alcohol Tax
  
• Cigarette Wholesaler
  
• Coal Severance Tax Return (August payment)
  
• Commercial Mobile Radio Service (CMRS) 911 Charge
  
• Consumer Use Tax
  
• Health Care Provider Tax
  
• Insurance Premium Surcharge
  
• Motor Vehicle Rental/Ride Share Tax
  
• Oil Production Tax Return (August payment)
• Sales Tax (Monthly)
  
• Sports Wagering Excise Tax
  
• Telecommunications Tax
  
• Tobacco and Vapor Products, Snuff, and Chewing Tobacco
  
• Transient Room Tax
  
• Utility Gross Receipts License Tax
  
• Waste Tire Fee
  

September 25

• Twice-Monthly Income Tax Withholding Return (September 1—September 15 payment)​
  
• Electric Vehicle Power Excise Tax
  
• Motor Fuels Tax
  
• Sales Tax Accelerated Filers
  

September 30