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.
Allowable Fuel Claims. If you use your car only for business purposes, fuel expenses are 100 percent deductible. If you use your car for a combination of business and personal use, you can only deduct the portion of fuel used for business purposes.You may only claim non-reimbursed fuel costs on your tax return.Be sure to exclude any fuel costs that were reimbursed by an employer or client.llowable Fuel Claims. If you use your car only for business purposes, fuel expenses are 100 percent deductible. If you use your car for a combination of business and personal use, you can only deduct the portion of fuel used for business purposes.