An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Fuels Registration, Reporting, and Compliance Help

Form 3520-13B: Supplemental Additive Manufacturer Annual Report

Form 3520-13B is a supplemental form for fuel additive manufacturers reporting more than 16 additives.

It is submitted annually by fuel additive producers and importers in addition to one 3520-13A form.

Download documents:

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.