Tax code determination when Plant country differs with Co.Code Country

Dear Experts,

We have an issue in Tax code determination. We use condition records for determination of Tax code in purchase order. In our scenario, Company code is assigned to Country - Switzerland (CH) and Plant is of Singapore (SG).

We maintain condition records for a combination of Country / Plant / Tax indicator for Acc. Assignment, combination. Now when we are trying to maintain condition record with country as CH, then that condition record is not being picked up in the Purchase Order as the Plant Country is SG

If we try to create condition record with SG as country, then the tax code being specified in the condition record is not accepted, as that corresponding tax code is not available in the Tax Procedure of Singapore.

So, it is checking the Tax procedure of Country specified in the condition record at the time of Condition record creation and checking the Country of Company code while Purchase Order creation for determination of Tax code.

Please advise the way to handle such issue, with condition records only

Thank you,

Best Regards,

Ramakrishna Mangena