In AX2012, the country/region context has replaced the country configuration keys.In earlier version of AX configuration keys had to be enabled manually and they were installation wide. If the installation included legal entities from multiple countries or regions they all were affected by the configuration keys settings.The new country/region context framework uses the primary address of the current legal entity to determine the appropriate context.If you for example want to use the Tax 1099 you need to have USA as country/region on the primary address on that legal entity.The country/region settings are also fully aligned to the EU Sales list and Intrastat reporting features.A known issue which I want you to be aware of is that payment formats also can be affected. In Sweden AX uses different bank account types, so you need to setup SWE as Country/Region on the address "tab" on the vendor bank account. After that you are able to choose which vendor bank account type you want to use.
Written by Johan Hellman