Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

How to deduct operational loss from my personal income tax?
I'm not an accountant, and you should probably get the advice of one to be sure about what to do.  However, if the business is a sole-proprietorship, you'd complete a Schedule C for the business, and you'd end up with a loss at the end.  If the investment you made in the business is considered to be entirely or partially "at risk" per the IRS definition, you'd get to claim all or part of the loss as a reduction in your income.  If the business was an LLC, then you're beyond my already limited knowledge. There may be some other considerations based on whether this was really a business vs a hobby, and whether or not you're going to try to continue with the business, or whether you've shut it down.  I'm not sure about those parts, but they'd be worth exploring with an accountant.