Line 11
The total cost you can deduct is
limited to your taxable income from
the active conduct of a trade or
business during the year. You are
considered to actively conduct a trade
or business only if you meaningfully
participate in its management or
operations. A mere passive investor is
not considered to actively conduct a
trade or business.
https://www.irs.gov/pub/irs-pdf/i4562.pdf at p.5.
