Diagnosis
For the system to be able to process input tax distribution for adocument with account assignment to a CO object (order, WBS element,cost center), the CO object has to be uniquely assigned to one realestate object. For this real estate object, an option rate method isentered that is used to determine the option rate that is relevant forthe input tax distribution posting.

Procedure
Designate one of these assignments as the one that is applicable for theinput tax distribution (Option Rate Relevant indicator).