Before completing a tax return using the TurboTax online editions, in the File section on Step 2 you are given specific options to pay the taxes owed, federal and state.

See this TurboTax support FAQ for paying federal taxes owed - https://ttlc.intuit.com/community/tax-payments/help/how-can-i-pay-my-federal-taxes/01/26212

See this TurboTax support FAQ for paying the state taxes owed - https://ttlc.intuit.com/community/refunds/help/what-are-my-options-for-getting-my-state-refund-or-fo...