IL-1040 Test Cases, Schemas, and Business Rules

Test cases, schemas, and business rules are located on the FTA’s State Exchange System (SES). To request access to the SES, email your user’s name and email address to Rev.TaxLOI@illinois.gov. You will need to complete the 2018 Tax Software Provider Illinois Department of Revenue Letter of Intent, submit it to Rev.TaxLOI@illinois.gov, and obtain approval to access the test cases, schemas, and business rules.