​July 1, 2025​

​The Wisconsin Department of Revenue (DOR) set ​up web services to facilitate Real Estate Transfer Return (RETR) submissions and processing.

Available Services

These services are currently available to submit and retrieve RETR related information.

1. Submit RETR
2. Retrieve RETR
3. Submit Recording
4. Retrieve RETR - Recorded Only
5. Submit Official Parcel

Software providers may request access to one or more RETR web services from DOR. After meeting the required criteria, you will be authorized to use the web services you requested. See details in filing package.

Package Information

Zip file – RETR XML Return Filing Package – RETRSchemaPackage.zip

Package contents

• XML schemas – folder contains XML schemas for 'Submit RETR' and 'Retrieve RETR' web services and documentation including enumerables and relationship rules
• Sample XML files – folder includes examples of valid files, success responses, and error responses
• Developer's Guide – PDF document to provide an overview of desired protocols, developer instructions, file validation error codes and messages, and approval process
• Validation criteria – Excel spreadsheet to provide business rules related to RETR fee exemption codes

Reminder

• Provide formatted parcel numbers with punctuation (ex: "." and "-") – see valid parcel number formats for each county
• Provide applicable county and municipality codes – see an alphabetical list of Wisconsin taxation districts in each county