Hey So im working on a app that will invoice out product. What I need to figure out is how to add rows to the invoice and then add up the values of the product plus have a checkbox to include tax or not. I found a link that has it partially. http://www.webdeveloper.com/forum/archive/index.php/t-163657.html I need product info, qty, price of product, and subtotal of product... then add row if need be, at the end have sub total of everything... a checkbox with tax, and if it has tax display how much tax is, then the full total. Phpbms has it exactly how I want it. If you try to create an invoice, it will show you how I want it.