134 N Merchant St, Decatur, IL 62523Broker, not a lender · (217) 296-7415
(217) 296-7415Send a RequestRequest

Illinois Business Registration (REG-1) and MyTax Illinois: The Tax IDs Partners Ask About

Stores and restaurants applying for funding are often asked for their Illinois tax registration. This guide explains the terms owners run into (REG-1, MyTax Illinois, the business registration number, the certificate of registration) and what a funding partner is looking for when it asks. It is not tax advice.

Larkridge Funding Group connects you with lending partners; partners make credit decisions and set rates and terms.

Two kraft binders of papers with a pen on a desk by a window overlooking young corn and a lake
In short

Larkridge Funding Group, a small-business funding broker in Decatur, Illinois, explains why lending partners ask Macon County stores and restaurants for Illinois tax registration details such as the REG-1 application, MyTax Illinois account, business registration number and certificate of registration, and how to keep them consistent across a funding file. Lending partners make credit decisions and set rates and terms.

Why tax registration turns up in a funding request

A lending partner wants to know that the business it is reviewing exists, operates under the name on the application and handles its tax obligations. For a business that sells goods, a state tax registration is one of the simplest ways to show that. It sits in the file next to the federal EIN, the formation documents and the bank statements, and the partner checks that they all describe the same business.

This matters most for the businesses that sell taxable goods: in Macon County, Illinois that includes 326 retail employers and 218 food service and drinking place employers in 2023 (U.S. Census Bureau, County Business Patterns 2023), plus 576 retail businesses with no paid employees in 2024 (U.S. Census Bureau, Nonemployer Statistics 2024).

The terms Illinois owners run into

Owners searching this topic meet the same handful of terms again and again. In plain words:

  • REG-1. The form owners search for as the Illinois business registration application, used to register a business for state tax purposes.
  • MyTax Illinois. The online account system owners search for when registering, filing and checking a state tax account.
  • Illinois business registration number. The state account number a registered business receives; owners often search for a lookup.
  • Certificate of registration. The document that shows the business is registered for sales tax; owners search for it as the Illinois sales tax certificate of registration.
  • Resale certificate. Searched as the Illinois resale certificate (often with the form name CRT-61), used between businesses in the supply chain.

What a funding partner actually checks

  1. The name matches. The legal name on the registration should match the name on the bank account, tax returns and formation documents. A trade name (DBA) should be traceable to the legal entity.
  2. The address matches. If the business moved, for example from a home address to a storefront in Decatur, IL, the registration should show the current location.
  3. The dates make sense. A registration dated last month sits oddly beside an application claiming three years of sales.
  4. The account is in order. Some partners ask whether tax filings are current. Unpaid state tax can show up as a lien and change the review.
  5. The owner is who they say. Ownership on the registration should match the people signing the application.

None of these are trick questions. They are consistency checks, and a file that passes them moves faster.

Retail and restaurant files in Decatur, IL

For a store asking for inventory financing, the registration supports the story that the stock will be sold, and sales tax filings can corroborate the sales history shown in the bank statements. For a restaurant, the registration sits alongside food service and other licenses in the file. In both cases, a partner may ask for a copy of the certificate of registration rather than just the number.

In the office ZIP code, 62523, retail had 29 employer establishments and accommodation and food services 21 in 2023 (U.S. Census Bureau, ZIP Code Business Patterns 2023). Many of them are small: 51.7 percent of the ZIP's retail employers had fewer than five employees, which usually means the owner keeps these papers personally.

A five-minute check before you apply

  • Find your registration number and keep a copy of the certificate of registration with your funding papers
  • Compare the legal name and address on it with your bank statements and latest tax return
  • Note the date the business registered and the date it started trading
  • List any trade names and the entity each belongs to
  • Ask your accountant whether any state filing is outstanding

If something does not match, fix it or be ready to explain it. Partners are used to businesses that moved or renamed; they are less comfortable with gaps nobody mentions.

Where this guide stops

This guide does not tell you whether, when or how to register; those are questions for the state and for your accountant. Tax advice is outside what Larkridge Funding Group provides. For how a request moves after the paperwork is ready, see the four steps; for the six funding options, the comparison page; and for the other guides, the resources page.

By Larkridge Funding Group · Updated

Common Questions

Short replies to what Macon County owners ask most.

What is the Illinois REG-1?

It is the form owners search for as the Illinois business registration application, used to register a business for state tax. Check the details with the state or your accountant.

Why would a lending partner ask for my certificate of registration?

It helps show the business is registered for sales tax under the same name and address as the rest of the file.

Is my Illinois business registration number the same as my EIN?

No. The EIN is a federal number; the state registration number is a separate state account number. Partners may ask for both.

Can Larkridge Funding Group register my business with the state?

No. Larkridge is a funding broker and does not handle registrations or give tax advice.

Still have a question? Call (217) 296-7415 and ask Larkridge on N Merchant St.

More to Read

Decatur, IL Commercial Space

Leasing or buying commercial space in Decatur, IL: zoning, building permits, lease terms and how each affects a funding request.

Decatur, IL and Macon County, IL Help

Free small business help for Decatur, IL and Macon County owners: SBDC advising, the SBA, state registration, the city, economic development and chambers.

Lead With the Purpose

Phone (217) 296-7415 or fill in the brief form, then explain what the money must accomplish; we will tell you which of the six deserve a partner's review.

Call