It is illegal to use your sales tax license to obtain personal goods or assets which you will use in business tax-free. Only goods which will be resold may be purchased exempt from sales tax. Sales tax must be listed separately from the purchase price on the items you sell on all invoices. Vending machines, bar drinks and mobile food cart vendors are exempt from this rule. It is illegal to advertise that you will make retail sales “tax free” or absorb the cost of sales tax.