How can we apply "item sales tax group", "tax group" , "ECC and TIN number" in purchase as well as sales oredr form in AX 2012?

Hi All,

Previously I worked with all above taxes in AX 2009 but now I want to see how can I apply “Item sales tax” and “tax group” on purchase and sales order form in AX 2012? If anyone have idea related same then plz share with me…