I had a question about eligibility for the EV/Tesla tax credit. From what I hear, your tax liability needs to exceed the credit amount (in this case $7,500) in order for one to receive the $7,500 refund/credit. What is the definition of tax liability - is it total taxes paid/due for the entire tax year or is it the amount due (or received in case one is getting a refund) in April of any given year? That would make a difference, since if it is defined by what is given or received in April, would someone who is owed a refund by the IRS then not be eligible for the $7,500 EV/Tesla tax credit? Thanks in advance.