ATTACHMENT 2 - Batch Header Record Layout and Enf of File - EOF Record Layout.pdf

This is a technical specification document for the Illinois Department of Revenue (IDOR) pertaining to the FY27-32 IL-1040 Data Entry Services contract. The document provides the record layout specifications for End of File (EOF) records used in data transmission files related to Illinois Individual Tax Return data entry services. The EOF record serves as the final record in transmission files and contains two data fields: a Record ID field that contains the constant value "EOF" and a Record Count field that documents the total number of records contained within the file, including the EOF record itself. Only one EOF record appears per transmission file, and the record layout utilizes a 15-character buffer with specific field positioning requirements established in the August 22, 2019 revision.

This attachment is part of a five-year service contract procurement managed by IDOR for IL-1040 Individual Tax Return Data Entry Services. The procurement is restricted to Small Business Set Aside Program vendors only, and the technical specifications outlined in this document establish the standardized format requirements that vendors must follow when submitting data files as part of their service delivery. The precise record layout specifications ensure data integrity and consistency across all vendor submissions throughout the contract term.