Something in your return triggered that it might be a good idea to consider for next year. The following TurboTax help article will give you some examples for when they are printed with your return. However, there is nothing filed with the IRS with regard to these vouchers for the next tax year and you are not required to use them or make the payments. They are there only to assist users who do wish to make estimated payments.
Why did 1040-ES estimated tax vouchers print out? Do I need them?