Claiming a US Federal tax credit for a 2006-7 hybrid car purchase involves more than just checking a box. If you bought one last year, H&R Block is offering this link to get you started – at no charge. Be sure to scroll down to the tables, where you can see which model gets you the biggest deduction. Note that certain alternative fuel-enabled vehicles also get a credit. Thanks to David Hanson in Des Moines for passing this on!