I just opened a home business and need to start filing quarterly. How do I do that in Turbo? It keeps taking me to my 2018

[VolvoGirl]

To prepare estimates for next year you start with your current return, but be careful not to change anything.  For Online returns, if you can't get back into your return, Click on Add a State to let you back into your retun.

You can just type W4 in the search box at the top of your return , click on Find. Then Click on Jump To and it will take you to the estimated tax payments section. Say no to changing your W-4 and the next screen will start the estimated taxes section.

Or Go to….
Federal Taxes or Personal (Desktop H&B)
Other Tax Situations
Other Tax Forms
Form W-4 and Estimated Taxes - Click the Start or Update button

And don't forget your state.  Go to the end of the state section, probably under Other Tax Situations

[Critter]

You use the 2018 program to complete 2019 estimated forms ...

Do I need to make estimated tax payments to the IRS?

https://ttlc.intuit.com/replies/3301891

Why did 1040-ES estimated tax vouchers print out? Do I need them?

https://ttlc.intuit.com/replies/3301872

How does TurboTax calculate my estimated tax payments?

https://ttlc.intuit.com/replies/3301730

Can TurboTax calculate next year's federal estimated taxes?

https://ttlc.intuit.com/replies/4242911

Can TurboTax calculate the estimated payments for next year's state taxes?

https://ttlc.intuit.com/replies/3301735