Ca Tax Board tells me I can pay income taxes by CC but TT doesn't give that option. It only gives the option of mailing a check or a payment plan. Why is this so?

I am trying to file electronically and pay by credit card to the State of California but Turbo Tax doesn't give me that option to pay by credit card although I know, according to the Franchise Tax board web site that I can pay by credit card as long as I pay a convenience fee. Can you please help me with this?