Blog & Newsroom

Important Tax Dates and Deadlines for 2020

by | 13 Nov | Uncategorized

2020 is almost here, and some important tax-related deadlines will be here with it. Be sure to plan well in advance of these dates to ensure you have sufficient time to plan and prepare to file your 2019 taxes. 

Here is a quick list of important tax dates for you to remember. Please keep in mind that all filings and payments should be postmarked by midnight:

DATE WHAT’S DUE Z NOTES
January 15, 2020
  • Partnership Tax Deadline

  •  4th Quarter 2020 Estimated Tax Payment Due

     

 
January 31, 2020
  • Form W-2 and some 1099-Misc due
 
March 16, 2020
  • Form 1065 (partnerships) due
  • Form 1120-S (S Corps) due
 
April 15, 2020
  • Form 1040 (individuals) due
  • Form 1041 (Trusts and Estates) due
 
May 15, 2020
  • Form 990 series (Tax exempt organizations) due
 
June 15, 2020
  • Quarterly tax estimate payment due
 
September 15, 2020
  • Extensions for 1040 due
 
September 30, 2020
  • Extensions for 1041 due
 
October 15, 2020
  •  Extended Individual / Sole Proprietor returns Due

  •  Extended C Corp Tax Deadline
 
November 16, 2020
  • Extensions for 990 due
 
     

 

Date

What’s Due

Z Notes

January 15, 2020

  • Partnership Tax Deadline

  •  4th Quarter 2020 Estimated Tax Payment Due

     

January 31, 2020

  • If you are an S Corp, you should file or apply for an extension.
    • Form W-2 and certain 1099-Misc due

 

  •  

March 15, 2020

  • S Corp Tax Deadline
  • If you are an S Corp, you should file or apply for an extension.

April 15, 2020

  • Individual Return for 2018 Due

  • 1st Quarter 2020 Estimated Tax Payment due

  •  Last Day to make a 2018 IRA contribution
  • If you do not file your individual tax return, you must file for an extension by this date.

  • If you haven’t maxed out your contributions to your IRA (Roth or Traditional) this is your last day to make a contribution. (Note: the deadline for filing and contributions to Keogh and SEP is October 15, 2020)

May 15, 2020

  • Non-Profit Tax Deadline
  • If you are a Not-for-Profit, you must file by this date or file for an extension.

June 15, 2020

  • 2nd Quarter Estimated Tax Payment Due
  • If you’re self-employed or have other forms of income that require you to pay a quarterly estimated tax they are due by this date.

September 16, 2020

  • 3rd Quarter Estimated Tax Payment Due
  • If you’re self-employed or have other forms of income that require you to pay a quarterly estimated tax they are due by this date.

September 16, 2020

  • Extended Partnership  Tax Deadline

  •  Extended S Corp Tax Deadline
  • If you received a filing extension on your partnership or S Corp’s 2018 return, your return is due by this date.

October 15, 2020

  •  Extended Individual / Sole Proprietor returns Due

  •  Extended C Corp Tax Deadline
  • If you received a filing extension on your 2018 individual or C Corp return, your return is due by this date.

January 15 2020

  • 4th Quarter 2020 Estimated Tax Payment Due
  • If you’re self-employed or have other forms of income that require you to pay a quarterly estimated tax they are due by this date.

 

What if I’m a Pass-Through Entity (S Corps or Partnerships) on a fiscal year?

If you are a pass-through entity, such as an S Corporation or LLC, your taxes are due on the 15th day of the 3rd month of your fiscal year. For an extension, your taxes are due on the 15th day of the 9th month of your fiscal year.

What if I’m a Sole Proprietor or C Corp on a fiscal year?

If you are an individual or corporation, your taxes are due on the 15th day of the 4th month of your fiscal year. For an extension, your taxes are due on the 15th day of 10th month of your fiscal year.

What if I’m an Exempt Organization (non-profit or charity) on a fiscal year?

As an exempt organization on a fiscal year, your taxes are due on the 15th day of the 5th month of your fiscal year. For an extension, your taxes are due on the 15th day of 8th month of your fiscal year.

If you have any questions about deadlines or what is required please feel free to contact your Zinner tax professional.

Since 1938, Zinner has counseled individuals and businesses from start-up to succession. At Zinner, we strive to ensure we understand your business and recognize threats that could impact your financial situation.
DOL Proposes New Independent Contractor Rule

What Employers and Workers Should Know The U.S. Department of Labor’s Wage and Hour Division announced a proposed rule intended to clarify when a worker is an employee and when the worker may be classified as an independent contractor under the Fair Labor Standards...

USPS Postmark Changes

A Tax Filing Risk Alert for Taxpayers For decades, many taxpayers have relied on a simple rule of thumb: if it is in the mail by the deadline, you are fine. However, recent U.S. Postal Service (USPS) clarification makes that assumption riskier. On Dec. 24, 2025, the...

Top Security Issues Tax Clients Must Watch Out for in 2026

Tax season has always been a prime opportunity for scammers, and 2026 is emerging as one of the most dangerous years yet. With increased filing confusion, AI‑powered fraud tactics, and a surge in data breaches fueling identity theft, tax clients need to be more...

Zinner & Co. Volunteers at Cleveland Food Bank Healthy Choice Market

On Jan. 22, Zinner & Co. employees spent the afternoon volunteering at the Greater Cleveland Food Bank’s Community Resource Center Healthy Choice Market. Our team was proud to support neighbors directly by helping make the shopping experience easier, more...

No Tax on Overtime Pay

The recently enacted One Big Beautiful Bill Act introduces a major change to the federal tax code, delivering welcome news for both employees and employers for tax years 2025 through 2028, as qualified overtime pay will not be subject to Federal income tax. This...

Send us your questions and we’ll share our insights with you on our blog!

Share Your Idea For 
A Zinner Blog Article