In 2019, I have wages from an employer as well as self employment income - can i use TT to do calculations and file estimated taxes?

[2018taxman2020]

TT=Turbo Tax 2018

[tagteam]

You can use TaxCaster for an estimate --> https://turbotax.intuit.com/tax-tools/calculators/taxcaster/

Subsequently, you can pay estimated taxes at one of the two IRS sites below.

https://www.eftps.com/eftps/

https://www.irs.gov/payments

[Hal_Al]

You can use TurboTax (TT) to do the calculations and prepare the vouchers (form 1040ES) for mailing in.  But you cannot e-file the vouchers or payments thru TT.

In your 2018 TT software, enter at:

Federal Taxes or Personal (H&B version)

-Other Tax Situations

  -Other Tax Forms

    -Form W-4 and Estimated Taxes - Click the Start or Update button

On the next screen answer No to the W-4 question

 
Or you can obtain  blank IRS Form 1040-ES from the IRS. The form and instructions are at this link:  https://www.irs.gov/pub/irs-pdf/f1040es.pdf

You can also pay Federal directly here.  Be sure to select 1040ES:

https://www.irs.gov/Payments