I am not sure what specific excise tax you are referring to, however I have provide you with some basic information below. I hope this helps!
Generally, excise taxes like fees paid on the purchase of gasoline are not deductible.
However state and local taxes imposed on personal property are deductible if three conditions are met – the tax must be:
Payment for car, truck, or RV registration and licensing or a motor
vehicle tax may be deductible as a personal property tax if it is
imposed annually and assessed in proportion to the value of the car.
Some states refer to their vehicle registration fee as an "excise" tax. If it meets the three conditions above, it would be deductible. Personal Property Taxes and TurboTax
If your excise tax qualifies as a personal property tax, follow these steps to jump directly to the entry screen for personal property taxes.