TurboTax automatically includes 4 quarterly 1040-ES vouchers with your
printout if you didn't withhold or pay enough tax this year. We do this
to head off a possible underpayment penalty on next year's taxes.
You're
not required to make estimated tax payments; it's just
a suggestion based on the info in your return. If you feel they're not
needed for next year's taxes, you can shred them.
And
Yes, you can absolutely change your withholding from your paychecks instead. Follow the directions in the FAQ below for help in how to change/update your W-4:
https://ttlc.intuit.com/replies/3301783