Note that any taxes due not paid by today (April 15, 2019) will incur interest & a penalty until the taxes are paid in full.
When you are ready to pay your taxes, for Federal you can mail in a check with the payment voucher (1040-V) that will print after you file your return. Or, you can pay on the IRS website.
https://www.irs.gov/payments
If you owe State taxes, you can go to your state website to pay onilne.
