I’m very pleased to announce that percentage based taxes (as well as discounts and fees) are now live and available to all users of Quotes! It seems that a few commenters here are looking for more sophisticated functionality such as auto-calculation of tax by region, setting defaults, etc. If you are interested in any additional feature like that, please file a new separate ideas post so we can accurately track community interest on those additional ideas. Thank you again for your feedback and patience!