How is doing small business accounting on an iPad, with a keyboard, any different that doing small business accounting on a Surface? You tap on the screen where you want to put data and type. Also, when using FreshBooks, which is what my comment was about, once you set up your customers, line items, and rates, creating an invoice involves about five taps and maybe typing in the number of hours/quantity, if it differs from the default of 1. That's it. I'm not sure how Windows could possibly make that any easier.