To get back to the Self-Employed questionnaire, when you are in your TurboTax Online return,
- Click Federal or Wages & Income If Federal is already opened) from the list of options on the left.
- Click the Review or Edit/Add button (whichever appears) next to Self-employment income and expenses
- This will take you to the Summary page for that category. Click Review or Edit/Add next to the self-employment activity you wish to revisit (you may have more than one listed).
- Click General Info if you wish to review the general questionnaire or one of the other items that appears.
See this article for more information on reporting small businesses in TurboTax.