Tax Code in Accounting Document at GR Level

Hi Experts,

I need to know how can I display tax code in accounting entries at the time of GR. I have created a PO which has a tax code and a tax rate. The tax rate has to become part of material cost as the tax in not claimable. System shows blank in tax code field in accounting entries at GR level. However, its correctly, adding the tax amount in material cost and posting to inventory GL.