2023 IRS Tax Deadlines

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Partnerships - Form 1065 : March 15, 2023 (Wednesday)

S Corporations - Form 1120S : March 15, 2023 (Wednesday)

Individuals - Form 1040 : April 18, 2023 (Monday)

Corporations - Form 1120 : April 18, 2023 (Monday)

2023 Estimated Tax Deadlines :

April 18, 2023
June 15, 2023
September 15, 2023
January 15, 2024

2023 Extension Tax Deadlines 

Partnerships/S Corporations : September 15, 2023 (Friday)
Individuals/Corporations : October 16, 2023 (Monday)