Can I make "tax-included" sales?

Yes. Effective January 3, 2008, as a vendor, you may assume and absorb all or any part of the sales and use tax on a retail sale and pay that tax on behalf of the buyer. You must, however, continue to separately state the tax from the sales price at the time of sale to the purchaser. If you absorb all or any part of the tax on the sale, you must pay the tax with the return that covers the period in which you made the sale.