Tax credits are on page 2 of the 1040 form. Check the IRS website for details
You need form 8910, it is available on the IRS website if you can’t find one.
You also cannot be leasing the vehicle, and you must be the original owner.
You are entitled to approx. $1575 credit.
The car dealership should have information on how much of a tax credit there is for the Prius. The credit is not the same for all hybrids.
,,id=165649,00.html has info on credit amounts. This might give you what you need. The Prius is right on the top line.