I require sub categories in zoho invoice, I have 2 companies (organizations) in operating in zoho, as I am a property developer with many different projects happening at any one time as why I need too perform a category for every stand alone project within each company, this will assist me in tracking expenditure on each individual project with in a specific company. I need this add on to also perform well within the overall zoho program and to have it part of the over all functionality and integrity. Please feel free to as any questions that you might have. Thx