I am possibly misunderstanding something here, so let me frame an answer to a slightly different question.
Your e-ticket email should show
1) Total cost of the ticket including taxes, fees and charges (TFC). This is marked "Payment Total".
2) The base fare should be shown as "Fare Details".
3) In a separate section if the TFC section. The bottom line says "Total taxes, fees and surcharges per person".
2) plus 3) should equal 1).
Does your email say something different? And is this a ticket that has been altered since first purchased?