Hello Vani Kuppusamy,
If you want to know the details regarding the entry in T030K - for MWS, first check the entries in the tables. If the same are missing then maintain the entry in OB40 for transaction MWS with valid tax code.
Now check the tax code that you have input while posing the document in MIRO, whether the proper tax code is used or not, for MIRO it should be input tax code.
In addition to the same do check the tax category of the relevant GL Account it should be "<" - Input tax account. (this will give error if you are posing to a output tax code)
Do let us know if you still face problem/issues.
Thanks,
Vishal
