where to add fields in FI for allowing them in field catalog

Hi All,

I need to add two fields (supplying region and receiving region) in komp and komk tables. so that i can use these to create a condition table which i want to use in MWST for VAT and CAST tax determination. I am able to do this without any issue.

But the problem is after i did the above when spro->financial accounting->financial accounting global setting-> tax on sales/purchase->check calculation procedure-> access sequence and add the condition table but for to assign the z fields from field catalog i am unable to see them in the field catalog.

Do i need to add these z fields somewhere in allow field catalog in FI, please let me know

All solution will be appreciated.

regards,

samuel