I've filled out Schedule C with a number of business deductions totalling ~18k, yet my total tax due remains unchanged. Are there reasons Schedule C isn't allowed?

[albinosquid]

I've filled out Schedule C with a number of business deductions totalling ~18k, yet my total tax due remains unchanged.  Are there reasons Schedule C isn't allowed?  Is this tied to a threshold of revenue, profit, and/or taxes paid from the business?

[Cindy0H]

As long as you answered you are At Risk for the loss, then there is no limit as to how large the loss can be. Make sure that is marked correctly:

• Business
• Business Expenses
• Edit your business
• At the bottom of the page...Final details...special situations...those should NOT be checked

Now it is possible if you have a large loss you might not have enough other income to fully absorb it and may have a Net Operating Loss.