QUOTE(Lemonade @ Mar 5 2006, 03:10 PM)

I read this from the link...
QUOTE
The two companies that process credit card payments for the I.R.S. — the other one is Link2Gov — extract a 2.49 percent "convenience fee" from taxpayers to both cover the merchant fee that the credit card company charges and to make a profit.
Since few reward cards pay more than a 1 percent cash reward, you'd be in the hole if you paid by card.
Scary!
2/3 of my CCs are rewards cards, but I didn't have to pay taxes this year. I think I get $29 back.

doubles miles with UA MP card.
double points with AMEX.
many discounts for the services too.