Use this form to figure the environmental tax on: petroleum, ozone-depleting chemicals (ODCs), imported products that used ODCs as materials in the manufacture or production of the product, the floor stocks tax on ODCs, taxable chemicals and the applicable rates, and taxable imported chemicals substances and the applicable rates. Current revision Form 6627 PDF Instructions for Form 6627 (Print version PDF) Recent developments IRS action on decision related to tax year 2022 Form 6627 and its instructions -- 10-MAR-2023 Superfund chemical excise taxes Other items you may find useful All Form 6627 revisions About Publication 510, Excise Taxes (Including Fuel Tax Credits & Refunds) About Form 720, Quarterly Federal Excise Tax Return Other current products