View Your IRS Account Information
To view your estimated payments history and outstanding owed amounts register by clicking the above link. There is even a portal to pay online, and other important features relevant to your tax status.
Paying Your IRS Income and Estimated Tax Online
Pay in less than 5 minutes with online convenience, and receive a confirmation of payment print at the end, too. Go here to pay if you owe for the tax year just filed, for the 4 Estimated Tax deadlines, and for a number of other options.