Hi.    Just to add to my previous post, I've also tried to follow the directions here .    It looks like it was updated 5 days ago.....however the app is not called "Sync with PayPal", I can only find "Connect to PayPal".   Also, per step 6 of the QuickBooks Online portion, a new tab should open.   That does not happen.   It asks me to log in, and the go through the whole process (steps 1-5) again.   So I think you have some defects in your app!