SAP Message 3W632 - Registration info. for Trusts, Companies or CCs is mandatory for the IRP5

Diagnosis
Entries in the 'Registration Number' and 'Registration Name' fields arenot mandatory for tax calculation purposes. However, entries in thesefields are required for IRP5 tax certificates.
Note: For employee natures 'Partnership' and 'Corporation', theregistered name and number are optional.