To change this answer, you need to review the General Info for your business.

In TurboTax self-Employed:

1. Open your return
2. Click on Federal in the left-hand column and Income and Expenses at the top of the screen
3. Click Review on Self-employment income and expenses 
4. On the next page, click Review next to your Business
5. On the next page, click Edit next to General Info
6. On the next page, click on the blue pencil icon next to Need to send a 1099 (see attached screenshot)
7. Follow the interview and you can change your answer.