Sorry about butting in @umair . I am having the same problem and I followed the instructions on the link that you mentioned. I set taxes on each item individually, as many of my items have different taxes ranging from 18/10/5/0 rates but no item has two different rates. either an item belongs to an 18% category, or 10, 0 etc. Whenever i try to do pos invoice, so or quotation it is not picking up the item taxes but what I have defined in the accounts—>selling tax master. if i put them to zero the invoice has no tax if i set default to 10% then the invoice items all show 10%. The taxes being set on the items are being ignored totally. I am testing v4.00 for production. Reading your link I understood that the taxes set on items has priority?