Thinking about charging it on one or more of my credit cards.

Official Payments charges 2.49% fee. TurboTax apparently has a way to charge your credit card but it looks like they're using officialpayments.com so the bill is likely the same.

The cards I have are:

1. SkyMiles Amex Platinum
2. Starwood Amex
3. Schwab Visa with 2% back on all purchases

That fee is steep but then again, I guess if I pay with a check, I would get no rewards of any kind.

The bill for federal and state is about $45k.

My Amex cards each have a limit of $21k each. Schwab is the only one to which I can charge it all.

So which combo of rewards and charges would have the most benefit?

I guess I could get close to 10k MQM with the SkyMiles Amex or charge $40k and transfer 50k miles with the 20% transfer bonus.

Or get 2% of the total bill back to my Schwab account.

With the Amex cards, I'd have to charge more than once, if trying to charge it to one or the other, not both.

Anyone else charge big tax payments to credit cards?

Or just better writing a check?