Problems with new payment manager

Hi support team,

I have successfully integrated the new payment manager on our test site for further testings, before we proceed to activate on live site. But there are some problems to be solved and your help is needed.

1. The tax setting is 19% SS > https://www.screencast.com/t/YskC9iefYVIz but does not calculate proper because using 20% instead within invoice and while clicking on recalculate. SS > https://www.screencast.com/t/ar61SczrjU3S
Calculation should be
1 EUR
– 0,25 EUR (25% Discount)
0,75 EUR
+ 0,14 EUR VAT (19%)
= 0,89 EUR Total

But it used 20% with total 0,90 EUR instead.

Links
> Invoice
> Edit Invoice

2. I am unable to setup/change or add the address as there are mark items within SS > https://www.screencast.com/t/FC6VvmFSJ6Ai
> Edit Invoice

3. In which database table are the data of the invoice from WPInvoicing stored, as we would like to add an API to get those data from for accountancy & reporting tool we use.

BR, Alex