Deactivation Impact of ISO Code and Vehicle country key

Question

Hello All,
We have a requirement to use the BSEG-KIDNO in accounting document line item. This field has to do some calculation by using Validation exit. This calculation works fine except for certain countries like Sweden(SE), for which some standard function module is triggering. On further research we have found that by deactivating the country specific checks( Vehicle country key and ISO code) we can deactivate the standard function module and make our validation exit work. This can be acheived by making blank for  "Vehicle Country Key" and ''ISO Codeu201D in OY01 (IMG--> General setting --> Set country --> Define country) for Sweden.
Could you please explain what will be the impact in other areas by deactivating ISO code and Vehicle country key in OY01.
Appreciate your reply.
Thanks in advance.
Prasad

Answer 1

Hi Prasad,
You should not remove them since
ISO
The entry is used in countries of the European Community to check the
VAT registration number (VAT reg.no.). You can store the VAT
registration number in the master record of a customer or vendor, or for
the company code.
The ISO code is used as the country key when exchanging information via
EDI. You must therefore specify the ISO code for each country in this
field if you use EDI.
The ISO code also controls which additional specifications are relevant
for a company code. You can always only enter the additional details
which are relevant for the company code country or for all countries.
The assignment to the country takes place via the ISO code.
Vehicle country key
    The vehicle country code is a standard key worldwide. It does not depend
    on the country in which the SAP System is installed.
    The key is therefore used as a basis for accessing country-specific
    check routines. Furthermore, it can also be used as a supplement to the
    postal code.
    This key should be specified for all entries in the country table.
Can you check the OY17 setting under the Further Checks Bank data check box for working Country and Sweden?
Reg
Vishnu