Hi,
I am facing a problem of PO amount and tax amount getting changed when Purchase backorder is created.

I am creating purchase backorder by checking the 'Final' checkbox in Warehouse Receipt.
The backorder is generated and confirmed. But the Order Amount and Tax amount for the Original PO changes. When warehouse receipts are made with 'Final' checkbox ticked, the tax amount increases whereas tha Order Amount reduces.
The Allow backorders and automatically confirm backorder parameters are activated in PO parameters.
Sometimes the PO amount becomes negative.
Is there any problem in PO parameters or procedure?
Thanks in advance.

Regards,
Hemant