If you only have W2 income you can probably use the Free Edition. It is free for both.
https://turbotax.intuit.com/personal-taxes/online/free-edition.jsp
Otherwise the state is currently $39. You can pay the total of both at the end when you file or have the fees deducted from a federal refund for an Extra $40 Refund Processing Service charge (45 in California).
How to see your fees
https://ttlc.intuit.com/community/charges-and-fees/help/how-do-i-review-my-fees-in-turbotax-online/0...
How to pay the Online fees
https://ttlc.intuit.com/community/payments/help/how-can-i-pay-for-my-turbotax-online-fees/00/27388
