Business & farm
It depends on the type of return you are filing.
If everything that has been invested in the company is from your own funds, and therefore any loss by the company comes out of your own pocket (and is not covered for you by someone else), then it is likely that all of the investment is at risk.
If you are filing Schedule C revisit the "Business Summary"
Click Edit and scroll to the bottom of the page and confirm that in the section "Other Situations" you are showing YES to "actively participating in this work".
See the screenshot below:
