To enter line 21 other income In TurboTax Self-Employed online edition,  go to :

1.  After sign into your account, select Take me to my return 

2.  Top right corner / in the search box- type in " other reportable income", and Enter

3.  On screen, "Other Wages Received", answer Yes / continue to follow prompts

4.  On screen, "Any Other Earned Income", answer Yes 

5.  On screen, "Enter Source of Other Earned Income". answer Other

6.  On screen, "Any Other Earned Income", enter description and amount.