I need to calculate 2019 estimated payments. My 2018 taxes have been filed, and it' s after Oct 15th. Can Turbotax do the calculation?

The TurboTax online editions for tax year 2018 are closed.

 

Use the worksheets in the IRS Form 1040-ES to calculate the 2019 estimated taxes - https://www.irs.gov/pub/irs-pdf/f1040es.pdf

 

Note - the 4th quarter estimated tax payment for 2019 can be paid at any time on or before January 15, 2020

 

IRS payments website - https://www.irs.gov/payments