Diagnosis
A serious program error has occurred.
System Response
The current processing step cannot be carried out.
Procedure
If the program error occurred
In a standard SAP program, then create an OSS message
In a program you wrote yourself, then correct the program.
Solution:
There can be Two reasons:
Missing Country/Region in Company Code ( T Code OX02 )
Missing Tax Procedure for Country/Region ( T Code OBBG )
STEP : Go to T code OX02 and ensure Country/Region is provided
or
STEP : Go to T Code OBBG and ensure your Country/Region is assigned to Tax Procedure
Thanks,
Adharsh K S