I am very sorry but I prefer to stay anonymous, the country is small and as I post certain tables with amounts in them I really prefer it to be this way.
Most countries use only one VAT code for “normal” purchases and sales.
Accounting wise they are collected together into the one Tax Payable account (Black & Red).
However, in the background Manager keeps a variety of separate purchase & sales totals based on the tax codes used so that they can be entered on to the various reports correctly.
Custom tax codes are limited to how they can be used compared to the in-built (downloaded) ones.
As I moved the accounts from Xero, I was trying to keep the kind of structure you see on this page(but not for UK):
When you have “Name/Tax Rate Display Name” “Tax Type” “Tax Rate”
I was expecting to have a “tax type” in manager that would show up on my side of the software but not on the invoices, receipts. I know Sage and the others do that to, not having this feature makes it very hard for us as we had to add all the tax codes in the tax name box(which shows all over the invoices/receipts). I tried custom box but it is not right either as it does not change according to the selected tax, you have to change it independently from the tax name you select.
As we need to fill in MOSS returns and recapitulative statements, it is very difficult to keep track of the various taxes without a tax type and tax type report. Tax type can help you understand with a short descript what this tax is about before adding it to the invoices/receipts. A small feature but so important.