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, and the floor stocks tax on ODCs. Current Revision Form 6627PDF Recent Developments None at this time. 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