Tax on project related intercompany AP invoices

Hi,
  We are implementing a tax rate to be generated on AR invoices from projects and in turn interface to AP as intercompany invoices.

 The tax is getting calculated on the AR invoice correctly but on the AP side the invoice amount on the header is having the total value with Tax from AR but Tax is showing 0

Ex
AR Invoice 
Line 1 -12000
Line 2 - 600
Tax    - 2016
Total  -14616 

AP Invoice 
Line 1 -12000
Line 2 -600
Tax    - 0
Total  - 14616 


AP invoice



AR Invoice