No you are not required to pay the estimated taxes. Turbo Tax calculates the estimated tax payments based on your 2016 entries. The IRS has a penalty if you do not make estimated during the year and have a tax due of more than $1000. If your income was higher in 2016 because of a big payment, or you adjusted the withholding on your W2s or 1099s, the estimated tax payments are not necessary.