Not sure what you have done with state. Did you mail in the state return? But you still need to file the federal return? Here's some options for paying the federal tax due.
How to pay a Federal Tax due
https://ttlc.intuit.com/community/tax-payments/help/how-can-i-pay-my-federal-taxes/00/26212
You can pay the IRS directly at
https://www.irs.gov/Payments
Or here is a blank payment voucher to send in with a check
https://www.irs.gov/pub/irs-pdf/f1040v.pdf
