As MG48 pointed out you can only use the depreciation deduction against business income on a schedule C (business income schedule). Brinstar, as you mentioned you never paid taxes before and are in high school, so you probably aren't running a business.
So in other words, you can't take the depreciation deduction against income such as wages or investment income. So most likely the deduction will not be applicable to you unless your running a business.
Also, are you familiar with the tax credit from the new energy bill which might apply to you? See other threads for details. A tax credit is actually a subtraction from the tax that you owe which is much better than a tax deduction/write-off. In other words, it looks like the government will give you back approximately $3,100 for a Prius put into service in 06 or $2,200 for a HCH. Tax credit is better than a deduction.
Just a warning- Haven't researched yet, but the tax credit may be only available up to your tax liability. In other words, you have to have a tax liability up to $3,100 to get the full energy bill tax credit for a Prius. I estimate you have to make up to have income up to $28K before you pay taxes of $3100. I know taxes get complicated.
Does anybody know if the tax credit is a fully refundable credit, or only refunded up to your tax liability?
