Important Tax Deadlines and Dates - Business

Businesses - Partnerships (including LLCs), C Corps (Form 1120), and S Corps (Form 1120S)

• January 16, 2023 - 4th Quarter 2022 estimated tax payment due
• January 23, 2023 - 2022 Tax season begins
• January 31, 2023 - Employers send W-2s forms to employees
• January 31, 2023 - Send certain 1099 forms
• March 15, 2023 - Taxes are due for some business types (partnerships, multi-member LLCs, and S-Corporations).
• April 18, 2023 - Taxes for C-Corporations are due.
• September 15, 2023 - Deadline for extended partnership and S-corporation returns
• October 16, 2023 - Deadline for extended C-corporation returns
• January 15, 2024 - Fourth quarter 2023 estimated tax payment due

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