Third Party acct determination VAX

Hello,

When I am trying to create a Third party Sales order PR is generated. But in this PR the account assigment data is not what we have set in OBYC in GBB --> VAX. (COGS G/L)

Instead it is directly picking the Stock account G/L maintained in the BSX.

I am unable to understand as to why it is not picking the VAX assigned G/L in OBYC.

Please advice,

Thanks.