On Schedule 1, Other Income Statement, Page 2, Line 12 Other taxable income, TurboTax included text from my previous year's tax return. How can I delete this entry?

Without knowing the specific type of income that's reflected, it's hard to tell with precision where you should go in the program to remove the information.

However, it's likely in the Less Common Income area.  To find and delete such income in TurboTax Online:

1. If you don’t see 2022 TAXES in the left pane, select the dropdown to the right of Income & Expenses on the Hi, let’s keep working on your taxes! page and then select Let’s get started, Pick up where you left off, or Review/Edit,
   • Otherwise, in the left pane, select Federal, then Wages & Income.  This is labelled Income & Expenses in TurboTax Self-Employed
2. Scroll down and select the Show more dropdown to the right of Less Common Income
3. Select  Start or Revisit to the right of whichever category in which you think the income might be included 
4. Make any necessary adjustments

If this doesn't get you to the correct place in the program, please provide more information about what kind of income it is.