It looks like you are referring to estimated tax payments. When you finished your tax return, and printed your return, did the printouts include 4 payment vouchers? Most likely for the same amount and payment dates April 15, June 15, September 15, and January 15?
If so, what you have on your hands are 4 vouchers for estimated tax payments. It doesn't mean the amount for this year was divided into four payments. Estimated Tax payments are payments you make toward next year's taxes.
What are federal estimated taxes?
If you didn't set to pay the full amount and included your routing and account number, you are still responsible to pay the amount owed for this year.
How can I pay my federal taxes?
