Where do List the down payment we made on a car for business.

[CherylW]

You can't deduct the actual cost of your car.  You can either take the standard mileage deduction, 54,5 cents for each business mile driven, or the actual expenses, which include depreciation based on your car's worth (usually what you paid for it).

Your total purchase price (down payment included) goes in the Vehicle section of your Schedule C expenses.