Third Party Credit Card Processor For Paying Tax Owed

[Darbilyn]

I paid federal taxes owed with my credit card via Intuit Turbo Tax with my return.  I never got any confirmation that it processed, and it has not posted to my credit card as of yet. How many business days does it take to post to my credit card?  Who is the third party credit card processing service? 

[tagteam]

What is the TurboTax phone number? (intuit.com)