If you received odd job self-employment income that was not included on a Form 1099, you may enter that in the Add Income section of the Schedule C. Cash App transactions, cash, checks, and other methods of payment can be entered here. You will need the Self-Employed version of TurboTax Online or the Home and Business version of TurboTax Desktop/Download.
Click on Wages and Income on the left menu
Scroll down to Self-Employment and click on Show More
Click on Start or Revisit for Self-employment income and expenses
When you get to the Income and Expenses section
Click on the Add Income button
Select Other self-employed income, includes cash and checks and Continue.
Enter a Description, such as Cash App, and the Amount.