The Illinois (IL) state sales tax rate is currently 6.25%. Depending on local municipalities, the total tax rate can be as high as 9.75%.

Other, local-level tax rates in the state of Illinois include home rule, non-home rule, water commission, mass transit, park district, business district, county public safety, public facilities or transportation and county school facility tax. In addition, local government units may impose taxes or fees that the department does not collect.

Businesses selling tangible personal property at retail are required to register with the Illinois Department of Revenue.

How to Register

To register for a Certificate of Registration with the Illinois Department of Revenue, entities can access MyTaxIllinois, the one-stop portal for registration, filing, and remitting tax to the state.

How to File and Pay

Online -Taxpayers can manage their accounts, file returns and remit tax to the State of Illinois using MyTaxIllinois.

Deadlines

Registered Illinois retailers must file returns monthly, quarterly, or annually based on the taxpayer’s monthly liability, typically on the 20th day of the month following the recently completed transaction period.

Avalara Sales and Use Tax Products for Illinois

AvaTax – AvaTax is a powerful, online sales tax compliance solution that provides all businesses with a level of sales tax automation that until now has been available only to Fortune 500 companies. AvaTax’s transaction-based service model and seamless integration into business applications gives you rapid access to all jurisdiction assignments and real-time sales tax calculations. Cutting-edge technologies and superior processing logic can manage even the most complicated tax issues, such as situs, nexus, tax tiers, tax holidays, exemptions, certificate management and product taxability rules.

TrustFile - Avalara TrustFile provides detailed sales tax reporting for online sellers. Allowing businesses to know exactly where, when and how much to file. Ecommerce business owners can use TrustFile to determine whether or not they are collecting the right amount of sales tax in each individual state, and then store a record of their sales tax history securely in the cloud for free.

Illinois Department of Revenue