Purchase Price deviation while posting MIRO

Hello,

Please find attached file for tax calculation in PO.

GR posted with manually entered percentage of Excise Duty.

But while posting MIRO, CST amount is not fetching from PO. Instead of CST G/L the different amount is posting to Purchase Price Deviation of Raw material G/L.

What could be the reason for incorrect posting of G/L? Kindly give solution.

Regards,

Vrushali