I filed 2018s taxes and i just signed up for turbo tax today. Will turbo tax remind me when its time to file for 2019 personal and business taxes?

[Carl]

No. Also be aware that if your business is "NOT" a SCH C business then you can not use TurboTax Online to file that business return. So if you'll need to file an 1120, 1120-S or 1065 return you will have to purchase TurboTax Business for that. TurboTax business is not available as an online product or for MACs. It's for the Windows operating system only.

Also, separate business returns are due March 15th. The penalties for filing the business return late are $HIGH$ too. So don't be late.

[VolvoGirl]

What did you sign up today for?  Did you just file 2018 today?  All personal returns are due April 15 each year.  You can get a 6 month extension until Oct 15.  But any tax due is still due April 15.