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The document is the REG-1 Illinois Business Registration Application, which provides instructions for businesses to register with the Illinois Department of Revenue. It outlines steps for identifying the business type, providing legal and mailing addresses, detailing ownership and officer information, describing business activities, and signing the application. The form also includes sections for tax-related inquiries and requires submission to the Central Registration Division.

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Versions	Form popularity	Fillable & printable
2022	4.8 Satisfied (132 Votes)
2020	4.3 Satisfied (48 Votes)
2015	4 Satisfied (44 Votes)

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What is a Reg UI 1 form in Illinois?

The REG-UI-1 form serves as a vital document for businesses operating in Illinois to register for unemployment insurance. This form ensures that employers fulfill their tax responsibilities under the Illinois Unemployment Insurance Act.

How do I file my St 1 online in Illinois?

Can I file this return and pay the tax due electronically? Yes, you can use MyTax Illinois at mytax.illinois.gov to file your Form ST-1, and, if applicable, Form ST-2. MyTax Illinois also allows for electronic payment of any tax due. You can also file Form ST-1 using a direct file service through an outside vendor.

Do I need to register my business with the Illinois Department of Revenue?

Note: If you are starting a new business or have a business new to the state of Illinois, you should register with IDOR before you make any sales or hire an employee. Note: There is no registration fee.

Do I need to register for sales tax in Illinois?

You must register with the Illinois Department of Revenue (IDOR) if you conduct business in Illinois or with Illinois customers.

Why am I getting a letter from Illinois Department of Revenue?

Its an audit. Either you didnt report all your income to Illinois, like you forget a w-2, irs caught it, and you didnt amend the state return or you accidentally filed federal but the state return didnt go through. If youre not clear on what to do, call or email the contact on the letter.

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