No, you cannot add it to your W-2 but you go to Deductions & Credits and visit Cars and Other Things You Own and Sales Tax in Deductions and Credits- you may be able to deduct some items associated with the car.
- Federal Taxes
- Deductions and Credits
- Scroll down to Cars and Other Things You Own
- Also, scroll down further to Estimates and Other Taxes Paid and select Sales Tax to enter sales tax paid on the purchase.
Note: Above deductions are part of your itemized deductions. If you don't claim mortgage interest, real estate taxes, your car deductions will not make a difference on your tax return.