To make your tax payment for Federal taxes
Click the above link
Select 'Tax Return'
Select the tax return year you are making the payment for and click 'Continue'
Enter your information (as entered on your 1040 last tax season) and click 'Continue'
Enter your payment information and review and sign
To make your tax payment to your state
To make an payment plan with the IRS
You have a few options when it comes to making payments on tax you owe to the IRS. Click the link above to find out more.