Implementing GCC VAT

Hello

I am in the process of rolling out a new Ledger (12.1.2) for UAE.  Although GCC VAT is not scheduled to go live until Jan 2018, and currently there is no VAT in the UAE,  I want to make sure that whatever I set up now will not hinder any additional eBiz Tax configuration required when GCC VAT goes live.  Can anyone provide advice on what should be set up at this point in time to avoid any problems when VAT is implemented in GCC?  I would rather not do any configuration at this point, to avoid setting up the