We have a problem while firm purchase order from master planning it's not calculating Assessable Value,
we have to edit and re-enter the qty and picks Assessable value to calculate tax portion.
Kindly advise if any setup needs to be activated in AX 2012 R2.
Is that a custom field, or is it part of a localization?
Maybe check out this thread? Confirm that you have the parameters enabled that Kranthi suggests.