On-premise Purchase

Hello,

There doesn't seem to be a way to get support unless you buy something, which I'm interested in doing, but I have some pre-sales questions, hopefully the developers will see this, or another user can help

1. Does the On-premises package for $72 include double entry?

2. How do you update the On-premise version when new releases come out?

3. Is there a report that shows how much sales tax was collected "and" charged?

4. Can you import bank statements and stripe transactions?

Thanks in advance