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Former Member

Communication error with the external tax system(vertex_ms0018)

Hi All

I have installed ECC6 IDES S/W on my PC. I have activated SAP Insurance module (FS-CD). When I try to create business partner using FPP1 with US address, It is throwing error as follows:

"communication error with the external tax system(vertex_ms0018)"

I dont want to use any external Tax system like Vertex etc. because I am not calculating any taxes.

I gave correct US address with valid ZIP etc. but no use.

Please help me if any one of you has idea. How to overcome this error. How to deactivate connection to external tax system.

Your help will be greatly appreciated.



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1 Answer

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    Former Member
    Oct 18, 2013 at 06:32 PM

    Hi Giri,

    The menu you are looking is on the following path of the SPRO transaction:

    SAP Customizing Implementation Guide > Cross-Application Components > SAP Business Partner > Business Partner > Basic Settings > Tax Jurisdictions > Using Non-SAP Tax Software

    There you should be able to see clicking on "Assign RFC Destination to Country" the RFC destination.

    If you really don't want to use it, then just remove 'V' from it.

    You can just erase it (the function modules) or check what's wrong with the RFC connection using SM59 (or clicking on the previous item "Define RFC Destination for Tax Code".

    Have also a look at the tax calculation definition using OBBG.

    Normally you would have US | USA | TAXUS
    If you are using the external software you would put TAXUSJ here (OBBG)

    Hopefully this will sort your problem. If not, please provide more details.


    Jorge Laranjo

    +44 741 847 5946

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