In actuality, sales taxes are not deductible as you are simply collecting them from the customer and remitting them to your state and/or local taxing authority. So, you should report your sales net of sales taxes collected, and simply leave the sales tax off of your return. For instance, if you sold an item for $10 and collected another $1 in sales tax, you would report your sales in TurboTax as $10. The tax you simply collect and then send to the government, it is not income or expense to you.
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