Methods and systems for a location based system and method for calculating sales and use tax for non-traditional points of sale. The methods and systems include a mobile application, a non-transitory computer readable medium for calculating sales and use tax for businesses that do not have a human readable address. Methods and systems for calculating a transactional tax for a mobile app whereby the mobile app is taxed based upon the location of the mobile device or place of first use of the mobile app, rather than where the mobile device was purchased or where it originates.