You have not mentioned what kind of income you received in 2019--that is the most important factor in deciding which version of the software you need. Your marital/filing status does not determine which version of the software for you to use. Are you a W-2 employee or are you self-employed? Did you have investment income or rental income?
Here is a link to the online products which you should review to see what fits your situation best:
Just start with the Free edition and upgrade to the Deluxe edition if required.
If you previously used the TurboTax online editions filing as Married Filing Jointly, then you need to start a new account since you are now Single.
Go to the online website click on Start for Free on the Free edition and create a new account (do NOT sign onto the account with your previous User ID that was used for the joint account)