I live in California, ordered on line 2 cell phone units as upgrade of the ones we had. When they arrived, the sales tax was based on original price of $ 559.99 instead of the sale price of $299.99. Is this right?

Sales tx is based on the price you are paying. If it is on sale, then that is what the tax is based on.

Sales tx is based on the price you are paying. If it is on sale, then that is what the tax is based on.