Invoicify Pro –Smart Invoicing

I Installed the APP for the purpose of testing, here is what I found:

1- The invoice doesn't show the correct tax rate in our store, it shows 10% while our store has a different tax percentage.

2- The Shipping cost is not included in the invoice

3- The (Chat support button) is not working

4- Tax ID <<-- We don't understand where this ID is added , and what it affects? as it doesn't show on the invoice

5- The automation works once enabled in the settings

6- the app won't work unless you fill out business information in settings

7- The invoice sent on Email wasn't showing our email address, instead it showed "
no-reply@invoicifypro.com via my.beacons.email "