What Class in AX to know when adjustment is made to purchase financial transaction

Dear all,

I am using AX 2012 R3 cumulative update 12.

Could you inform me what class in AX to insert adjustment in purchase financial transaction?

When I post purchase invoice, there is adjustment in financial transaction.

I want to know how the AX system insert the adjustment.

I have tried to debug the posting process, but I do not find when adjustment is made.

Please help me. Thanks in advance.

Best regards,

Johanna