The set of things that are considered "losses" (i.e. deductible expenses) for personal tax filings in the US is pretty limited. State/local taxes (now up to a cap). Mortgage interest payments (also with some cap). Mortgage points, mortgage insurance premiums. Medical expenses exceeding some percentage of AGI. Investment interest expenses. Capital losses. Gifts to charity. Casualty/theft losses, subject to a bunch of constraints. Gambling losses (but can't exceed gambling winnings). Some other things I can't recall off the top of my head.

As I said above, corporation have a much larger set of things that are considered deductible against revenue to determine taxable income. Starting with the fact that corporations are generally taxed on "profit" while people are generally taxed on "income", which is closer to "revenue" in general.