Here is the link to pay the IRS online.  There might be a fee for paying with a credit/debit card.   
https://www.irs.gov/payments  Also, I'll post the links to the states below.

Select the following options: Reason > Tax Return, Apply Payment to >  1040, Tax Period > 2016

How do I contact my state's Department of Revenue?
https://ttlc.intuit.com/replies/3302452