If you are using TurboTax Online, please follow the following steps to change it:
1. In the side menu, click on the Income dropdown then on Self-Employment.
2. In the Self-Employment dropdown, click on Business or Professional Services.
3. You will then see the Self-Employment or Business Summary. Click on the Edit option found in the right side.
4. Then, click on Identification of your business.
5. Click on continue at the bottom of the "start with the basics" screen and keep on clicking continue until you reach the "Choose and Industry code for your type of work"
6. Click on the "guide you" link beside the question "Need more direction to answer this question?"
7. Then, choose the correct category for your business.
Thank you for choosing TurboTax.