Understanding the difference between IRS 8453-EO and IRS 8453-S

Last updated on Dec 8, 2025

What is IRS 8453-EO?

The IRS 8453-EO is a tax form used by certain tax-exempt organizations to electronically file their return. This form serves as an election to opt for electronic filing and confirms the authenticity of the electronic submission.

Its primary purpose is to authenticate and validate the electronic submission of Form 990 or Form 990-EZ for relevant tax-exempt entities.

1.

You may need IRS 8453-EO if:
2.

Your organization is a tax-exempt entity such as a charity or nonprofit.
3.

You are filing Form 990 or Form 990-EZ electronically.
4.

You are required to validate the filing of your Form 990 series return.

Who needs to complete a IRS 8453-EO?

Organizations that fall under tax-exempt status typically need to complete IRS 8453-EO when filing their electronic returns.

1.

Typically required for:
2.

501(c)(3) organizations (charities).
3.

501(c)(4) organizations (social welfare groups).
4.

501(c)(6) organizations (business leagues).
5.

Private foundations and other tax-exempt entities.

When is IRS 8453-EO due?

The IRS 8453-EO is due on the same date as the tax return for which it is being filed. Generally, the deadline is the 15th day of the 5th month after the end of your organization’s tax year.

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What is IRS 8453-S?

The IRS 8453-S is a tax form used by S corporations to electronically file their returns. Similar to IRS 8453-EO, this form is a declaration that verifies the electronic transmission of Form 1120S — the income tax return for S corporations.

This form ensures that S corporations maintain compliance while using electronic filing methods.

1.

You may need IRS 8453-S if:
2.

Your business is classified as an S corporation.
3.

You are filing Form 1120S electronically.
4.

You need to certify the authentication of your electronic submission.

Who needs to complete a IRS 8453-S?

Only S corporations completing their income tax returns electronically need to submit IRS 8453-S.

1.

Typically required for:
2.

S corporations with income, deductions, and credits.
3.

Form 1120S filers wishing to submit their tax return electronically.
4.

S corporations undergoing electronic filing for the first time.
5.

Similar entities that qualify for S corporation status.

When is IRS 8453-S due?

The IRS 8453-S is due on the same date as the Form 1120S tax return, typically the 15th day of the 3rd month after the tax year ends.

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Key differences between IRS 8453-EO and IRS 8453-S

Understanding the differences between these two forms is critical for compliance and successful electronic filing for both tax-exempt organizations and S corporations.

1.

Main differences include:
2.

IRS 8453-EO is for tax-exempt organizations while IRS 8453-S is designed for S corporations.
3.

The forms correspond to different tax filing obligations (Form 990 vs. Form 1120S).
4.

Filing deadlines vary: 8453-EO is due with Form 990, while 8453-S is due with Form 1120S.
5.

Required by different organizational types, affecting eligibility and application.

Understanding potential penalties

Tax penalties can arise from incorrect or late filing of forms, leading to additional financial burdens for organizations and corporations. It's essential to understand these implications to avoid unnecessary costs.

Failure to file IRS 8453-EO on time or submitting incorrect information may result in substantial fines for tax-exempt organizations. These penalties can range from monetary fines to loss of tax-exempt status if serious compliance issues arise.

For S corporations, missing the deadline for IRS 8453-S or failing to include accurate information may lead to penalties that include late filing fees and possible disallowances of credits or deductions associated with the tax return.

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Author:

by Iryna Marchuk

Lead Writer/Blogs Manager at airSlate

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