Can I mail in California tax return now (March), and then pay later on April 15?

I finished preparing my California tax return (Form 540) and I owe them. Can I mail in the tax return to California now (March) without a check, and then pay what I owe later in April using a credit card?

(I believe ACI Payments is the only authorized vendor, and they charge like 2.3%, which I'm fine with)