The check for completeness and conclusiveness showed that the VAT registration number is incorrect. Depending on country-specific rules, parts of the number are used to determine the check digit, which must also be part of the entered number; usually this consists of one of the last two digits
Hi,
we still did not get what exactly you require.
if you need to check the configuration of this error you can check the path
spro-- sap netweaver--general settings--set countries--set country specific checks
The checks are hardcoded, use the error message number along with the country and check for OSS notes, if you are certain that the information you got from customer or vendor is correct and entered correctly. There are websites to check the correctness of VAT numbers e.g. http://ec.europa.eu/taxation_customs/vies/
It seems that your question requires additional information. Please make sure that your question outlines the steps you took to find information and create the question again. This way members will know that you searched and were unable to find what you needed.
You may also want to include screenshots of what you're seeing, to help members further understand the issue. And please provide some additional details, as the question is fairly short.