Posted Purchase Transaction Showing Wrong Tax Rate

After running an initial tax rate data load for Month-1 tax data, STG “36251.U04” tax group gets loaded into ERP with Tax Jurisdiction “ALASHL01LU” associated to it having effective date as “1/1/1999” and tax rate “1.00”. When we create purchase order with today’s date as document date and calculate tax for this transaction, tax gets calculated with tax rate “1.00” for Tax Jurisdiction “ALASHL01LU”. And same tax amount is shown after posting the purchase order as well.

Now, when we run a subsequent tax rate data load for Month-2 tax data, effective date of Tax Jurisdiction “ALASHL01LU” changes to today’s date (no value is set for effective date in Wizard.xml) and tax rate changes to “1.50” for same Tax Jurisdiction “ALASHL01LU”.

For the earlier posted purchase order, the tax amount gets displayed with the new tax rate. Please refer to the below screenshot.

 Please let us know if this is expected behavior from NAV.

Thanks,
Todd