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IRS Tax Forms
Form SS-4

2025 IRS Tax Form SS-4

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Form SS-4, Application for Employer Identification Number (EIN), is used by businesses to apply for a unique tax ID. This number is essential for opening a business bank account, hiring employees, and filing tax returns.

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Purpose

Form SS-4 is used to apply for an Employer Identification Number (EIN), which is necessary for business tax reporting and other legal purposes.

Who Should File

Businesses, estates, trusts, and other entities needing an EIN for tax purposes should file this form.

How to File

Complete Form SS-4 with your entity's details and submit it online, by fax, or by mail to the IRS.

Where to File

File Form SS-4 online through the IRS website for immediate processing, or send it by mail or fax to the address provided in the instructions.

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Popular Tax Forms

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IRS Tax Form Category

IRS Tax Form Category
Business Tax Forms

These include specific forms for partnerships, corporations, sole proprietorships, small businesses, deductions, and various other purposes.

Employment/Wage Tax Forms

Used by employers to report employee wages and the taxes withheld from their paychecks.

Investment Tax Forms

Used to report gains, losses, and other details from investment activities.

Retirement Tax Forms

Filed to report contributions, distributions, and other details related to retirement accounts.

Self-Employment Forms

Used to report income for individuals who are self-employed or work as independent contractors.

Unemployment Tax Forms

Used to report and pay taxes related to unemployment compensation.