Illinois remote retailers with unpaid sales-tax obligations have until Oct. 31 to seek penalty and interest relief through a temporary state amnesty program covering eligible sales made from 2021 through mid-2026.
The program applies to qualifying sellers without a physical presence in Illinois that sold tangible personal property to customers in the state. The state bulletin says eligible liabilities include state and locally administered retailers’ occupation taxes incurred on sales from Jan. 1, 2021, through June 30, 2026.
Participants must submit an electronic application through MyTax Illinois during the Aug. 1-Oct. 31 window. Paper returns do not qualify. Sellers must already be registered with the Illinois Department of Revenue and have an active MyTax Illinois login, a process the department says normally takes one to two business days after registration.
The central incentive is the waiver of penalties and interest if eligible liability is paid in full during the program or through a successfully completed repayment plan. Illinois also permits a simplified return using a combined state-and-average-local rate: 9% for general merchandise and 1.75% for products normally taxed at the state’s 1% rate, including qualifying food, medicines and medical appliances.
That simplified treatment is intended for remote sellers that may lack complete records showing where sales occurred inside Illinois. However, businesses must preserve records supporting any sales reported at the lower 1.75% rate. If those records do not exist, the state presumes the sales are subject to the 9% rate. Any tax actually collected at a higher rate must be reported and paid at the higher amount.
The program was created in state law as a one-time compliance pathway. The statute establishes the same Aug. 1-Oct. 31 amnesty period and authorizes the Department of Revenue to accept returns and payment for qualifying remote-retailer liabilities. The Multistate Tax Commission also lists Illinois’s program among current amnesties, confirming the covered period and penalty-and-interest waiver.
Businesses unable to pay immediately may request an installment agreement by Oct. 31. Available plans run six, 12, 18 or 24 months and require a down payment. Interest begins accruing on the remaining balance Nov. 1, and failure to complete the plan removes the amnesty benefit and causes the liability to be recalculated under ordinary tax rules.
The downside of not participating can be significant. IDOR says a noncompliant seller may face audit, additional penalties and interest. When records are insufficient to identify the proper destination of sales, the department may assess a 15% rate on gross receipts assigned to undetermined Illinois locations, including for periods before 2026.
The deadline matters beyond large online marketplaces. Previously registered businesses that have closed may reopen their sales-tax accounts to apply, while sellers that were never registered must complete registration before accessing the application. The department also allows applicants to seek amnesty for selected months or ranges rather than every eligible period.
For affected sellers, the practical decision is whether the penalty-and-interest waiver and simplified rates outweigh the cost of reporting and paying past obligations. With registration and account activation required before filing, waiting until the final days could leave otherwise eligible businesses unable to complete the process by Oct. 31.
