How to e-file through TurboTax and pay tax separately with credit card through another payment processor?

I am thinking of paying my tax with a credit card. Upon some research, it seems TurboTax charges 2.49% in fees if paying income tax via credit card through its website, while payUSAtax charges 1.85%.

 

Is it possible to e-file through TurboTax and pay tax separately through another payment processor like payUSAtax? I assume the answer is yes, but it seems TurboTax only gives me the options of "credit karma money", "direct debit from my bank account", "charge my credit card", "pay by check", "request IRS payment plan" on the "how would you like to pay your federal tax" page, it doesn't provide an option of "pay with my credit card through another online service". So if I were to pay my federal tax through payUSAtax, which box should I check on TurboTax? And is it the same for State tax?

 

Thanks so much for your help! Any suggestions/advice is greatly appreciated!