At the end of the day, you (and only you) are responsible for separating your business from your personal expenses. When you work with an accountant and tax preparer, you typically have to sign a document stating that you are responsible for the claims on your tax filing, even if they prepared your filing for you. 

We're not allowed to provide direct tax advice, but generally speaking, expenses you incur directly related to your work or business are tax-deductible.

We created a free tax deduction resource for entrepreneurs called 99Deductions that has easy-to-understand explanations of popular, valuable deductions most business owners can take to reduce their tax liability.