January 16, 2024 - Estimated payment #4 for tax year 2023
January 31, 2024 - Form 1099-NEC, Form W-2, Form 941/944, Form 940
February 15, 2024 - Form 1099-Misc to receipient
Febraury 28, 2024 - paper filed Form 1099-Misc
March 15, 2024 - Tax returns for Partnership (Form 1065) and S Corporation (Form 1120S)
March 31, 2024 - E-file Form 1099-Misc
April 15, 2024 - Tax returns for Individual (Form 1040) and C Corporation (Form 1120)
April 15, 2024 - Estimated payment #1 for tax year 2024
April 18, 2024 - deadline to file 2020 tax returns in order to receive a refund
May 15, 2024 - Annual return for Non-Profit (Form 990) (Dec 31 fiscal end)
June 17, 2024 - Estimated payment #2
September 16, 2024 - Estimated payment #3; Extesion deadline Partnership and S Corporation
October 15, 2024 - Extension deadline Individual and C Corporation
November 15, 2024 - Extension for Non-Profit (Dec 31 fiscal end)
TBD - Last day for Individual return e-file