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New vending route business, not sure how to determine taxes
You're not paying taxes three times but you are paying three different taxes (or more). Sales tax is a business expense, just like costs of goods sold or interest on a loan.  Then, depending on how you structure the business, the net income of the business just hits you personally and you pay income taxes.  You can work with a tax person to lend some efficiency to this on a long term basis, but it's not like you pay all the taxes against your gross receipts. Whether or not you can make this profitable is a whole different issue.