Terms of use

By using IRIS CSV Tool you agree to these terms.

No tax advice, no filing

The tool formats data. It does not file returns with the IRS or any state, and it does not give tax, legal or accounting advice. You are responsible for the accuracy of the information you file and for meeting your filing deadlines.

Check your files

The tool makes automatic changes, such as shortening names and addresses, splitting names, and inferring TIN types. Review the list of changes and the files before you upload them. Rules can change when the IRS updates its templates.

No warranty

The tool is provided "as is", without warranties of any kind. To the extent the law allows, we are not liable for penalties, rejected filings or other losses from its use.

Not affiliated with the IRS

IRIS CSV Tool is independent and is not endorsed by or affiliated with the Internal Revenue Service.

Effective November 1, 2026.

Last reviewed November 1, 2026.