Originally Posted by itsme
And I very much doubt that there is any way to finesse the "convenience fee" when paying taxes by credit or debit card. And I will believe it is possible to use either a credit or debit card without any such fee and earn miles doing so when I see a working model of a perpetual motion machine.
From the link posted above for the AAdvantage debit card, note:
• To ensure that your purchase earns miles, you must press Credit when you authorize the transaction.
So you won't get any miles if you use that card for a debit transaction.