Tax representative in Portugal question

[tommigun (Tommy Gunn)]

I can only answer your first question: the tax rep situation has nothing to do with your GV process. Whether you need a tax rep or not (regardless of GV) is described in details in a dedicated thread here:

How to remove Portuguese NIF fiscal tax representative (while still resident outside Portugal)

I found these instructions very helpful for removing the fiscal representative: Context: Portuguese tax representation no longer required for non-EU residents