Potential car buyers have till the end of the year to grab this above-the-line deduction. By Mary Beth Franklin, Senior Editor April 30, 2009 The stimulus lets you write off state and local sales taxes and excise taxes on vehicles, including new cars, light trucks, motor homes and motorcycles bought from February 17 through the end of 2009. You can claim the deduction on your 2009 tax return (which you file next year), regardless of whether you itemize your deductions or claim the standard deduction, which is what most taxpayers choose to do. If you itemize deductions and normally deduct your state income taxes, you can also claim the new sales-tax deduction for a new car. But if you itemize and choose the option of deducting your state sales taxes (perhaps because you live in a state that doesn't have an income tax), you cannot claim the new above-the-line sales-tax break. Sponsored Content See More From the Stimulus Guide The New Stimulus Tax Credit This tax break puts up to $400 in your pocket. Better Benefits for the Unemployed Qualified filers get an extra $25 a week. Advertisement New Homebuyer Credit Take up to 10% off your purchase price. Health-Care Subsidy for the Unemployed Now there's extra help for paying COBRA coverage. AMT Tax Relief Taxpayers get a one-year fix on the alternative minimum tax. College Aid Gets Fresh Funding Rather than introduce big new ideas, this bill mostly replenishes underfunded programs and increases amounts available to families.