Tax Credit (edited)

I'm editing my post about Tax Credit, I'm waiting for some additional information from the CPA I use for tax questions, she's extremely busy right now so might be after the rush of the tax season.  Reason for editing is I don't want to steer someone in the wrong direction, I've been informed by others that there may be some conflicting info about how the 7500 federal tax credit works with refund vs. no refund etc...so more to come, I'll post the final tax credit/rebate info after I talk to my tax lady.