New Output tax code

Hello Gurus,

I have a requirement to create to new output tax code.

After creation in FTXP no transport was generated.

I read few threads and tried exporting it and transport was created.

My question is shall I include all tax codes in transport or only the one I created. What will be the impact on existing tax codes in production.

I see few unwanted tax codes existing in config. client.

Also the account determination in OB40 was transported. Do I need to maintain that directly in production system or export it?

Thanks