Tax Deductions
Overview
"You are responsible for paying only the correct amount of tax due under the law—no more, no less." http://www.irs.gov/pub/irs-pdf/p1.pdf
It follows you can tax business tax deductions for anything that's legally available to you.
If in doubt, keep the receipts and ask your tax accountant. But don't throw away receipts if they're business related. Money is hard enough to make without giving it away.
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