An ammonia test measures the amount of ammonia in the blood. Most ammonia in the body forms when protein is broken down by bacteria in the intestines . The liver normally converts ammonia into urea, which is then eliminated in urine. Ammonia levels in the blood rise when the liver is not able to convert ammonia to urea. This may be caused by cirrhosis or severe hepatitis. For this test, a blood sample may be taken from either a vein or an artery.
Deduction Amount hide... The deduction is equal to the cost of the vehicle's engine, the equipment used to store or deliver the fuel, and the equipment used to exhaust combusted gases, up to a maximum of $2,000 for vehicles places in service by the end of 2005.
You unfortunately canât take a tax deduction for gas taxes on your federal income tax return, however it is a component of the auto mileage rates that you can deduct on your taxes for use of your vehicle for business, moving, medical, or charitable purposes. The deductible standard mileage rates are:ut even if you never think of gas tax, it is likely that you benefit from its collection: state excise tax on gasoline funds highway and mass transit projects in most states.