Starting in 2006, individuals buying hybrid cars will get a tax credit instead of a tax deduction. The IRS has just started to kick out the exact amounts you can claim for your new hybrid.

Various Toyota Hybrids Get Tax Credit Certification From IRS

Under the Energy Policy Act of 2005, the tax benefits of owning a hybrid vehicle underwent significant changes. Whereas you could previously claim a tax deduction, the new law converted the deduction into a tax credit. Tax credits are FAR more valuable than deductions, because they reduce the amount of tax you owe on a dollar for dollar basis. Tax Deductions, on the other hand, merely reduce your adjusted gross income prior to determining the amount of tax you owe pursuant to the tax tables. In laymen