Unable to update external Tax info table TTXY

[ricky_shaw]

Hello,

I need to be able to update the external tax info table TTXY with new tax exemption amounts.

I am writing the code in the implicit enhancement point inside the class: (SE24): CL_XTAX_SYSTEM_VER_TAXDOC00 & method: RFC_CALCULATE_TAXES_DOC.

My code needs to calculate further tax exemptions.

But its still not updating the TTXY table with new tax amounts in fields TAXAMT1, TAXAMT3.etc

Can someone help me if there is any relevant customer exit on this or any other helpful suggestion?

Thanks

Ricky