At the moment, you can only use 1Tap Receipts on your smartphone - the whole idea is to easily snap the receipts using your camera. There isn't a web version of the app yet, but we plan to make 1Tap available for computers in the future.
Until then, you can use the build in CSV and PDF export functions to manage your expenses using Excel or other software.
Also, you can forward any emails you have that contain a business expense, invoice, or receipt to your 1Tap email (you can find one in app once you register) and we will process them just like we do with pictures taken in the mobile app. Here you can find the instructions how to do it.