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.
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- Instructions for Supplemental Fuel Additive Manufacturer Annual Report (PDF)(2 pp, 215 K, May 2018)
- Form 3520-13B: Supplemental Additive Manufacturer Annual Report (PDF)(1 pg, 833 K, May 2018)