If you have not paid for the online edition you are using, have not filed your tax return or registered the Free edition, then you can clear your return and start over with a lower priced edition. Click on Tax Tools on the left side of the program screen while working on the 2019 online tax return. Click on Clear & Start Over.
OR -
Use the TurboTax Free File program if you are eligible - https://freefile.intuit.com/
If you are eligible you can use the TurboTax Free File Program which is free to file both a federal and state tax return. The Free File Program edition is a full featured personal tax program and on a separate website from the TurboTax online editions.
To qualify for free 2019 federal and state tax returns with the Free File Program, you'll need to meet at least one of these requirements:
To avoid the pay with the federal tax refund service charge of $40, pay the TurboTax account fees with a credit card.
Online Deluxe is $60 for Federal and 50 for state. If you want to have the fees deducted from your federal refund there is an EXTRA optional $40 Refund Processing Service charge. Or you can pay upfront with a credit card to avoid the extra charge.
To go downgrade to a lower version you can try to clear and start over
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-clear-and-start-over-in-turbotax-online/00/26444
But you might need Premier to enter something. Or you can switch to the Desktop Deluxe version if you have a full Windows or Mac computer and you won't have to start over. All the Desktop programs have the same forms, you just get more help in the higher versions. I can tell you how to switch. You can check out Desktop programs here,