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When are Taxes Due? 2023 Filing & Extension Deadline


As law-abiding citizens, we must pay taxes on time so they can be used later for our benefit. However, keeping track of the tax dates with so much going on in our lives can be challenging.


Here is a brief overview of the important dates to help you remember when to file your taxes.


Everyone files their taxes from January to April, and the 15th of April is considered "tax day." In the US, the following business day is regarded as tax day if it is a weekend or holiday.

The tax day for 2023 is April 18, which is a Monday. Individual taxpayers, C corporations, and proprietors of small businesses can file their taxes at this time. The time will differ if you follow a different fiscal year.


Deadline for Paying Taxes

The payment deadlines stay the same if you apply for an extension. So you have to pay a late penalty of 0.5% of the taxes you owe each month, compared to 5% for late filing.


If you post your tax returns by snail mail, the IRS will consider them filed on time if you have addressed them correctly and provided proper postage. You can also e-file your returns before midnight on the tax filing date.


If you run a business where you have to pay quarterly taxes or estimated tax returns, the due dates are April 18, June 15, September 15, and January 15, 2024.


2023 Tax Extension Due Dates

You can file for an extension until the due date, so this year it is April 18, 2023. S Corps and partnerships can get an extension on 15th March, while C Corps can extend it till 18th April.

Tax Deadlines for 2023

Here are some of the crucial deadlines for this year.

  • 16th January 2023 is the fourth and final date for estimated quarterly tax payments.

  • Individuals can file it by 31st January 2023 and pay any remaining balance.

  • 31st January 2023 is the date for Form W-2 filing. You will have to fill out two forms for every employee you have- one for the IRS and one is the employee's copy.

  • If you work with independent contractors, you must also file Form 1099-NEC by 31st January 2023. You must fill out one copy for the IRS and one for the contractor.

  • 28th February 2023 is the last date for paper filing. If you miss it, you can file it electronically till 31st March 2023.

  • 15th March 2023 is the deadline for filing S Corporation tax with Form 1120-S and Partnership return with Form 1065. It is also the last date to apply for an extension.

  • 31st March 2023 is for filing Form 1099-MISC copy A filing.

  • 18th April 2023 is the deadline for filing and extension of individual tax returns.




At Mountain Top Bookkeeping, we help our clients and businesses file their taxes on time. We understand that it may be challenging to keep track of the various deadlines and extensions and the types of forms one has to fill out for filing returns. Our tax experts will help you file your taxes on time, apply for an extension, and give you the best tax refunds possible. We also provide other financial and tax-related services. Leave your taxes to us while you concentrate on your work.


Call us today if you want to file your taxes hassle-free. Our experts will review your annual income and tell you the best course for filing your taxes before the deadlines.



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