Depending upon when you start working on your expense report, trip might or might not be in there.
(eg if you're a wait until a few weeks after the end of the month to start working on it the computer might not be accurate)
At the top left of the expense report there is a tab titled something like ADD Bank. Simply click on it and provide the trip number and it should autofill the info.
Or manually add it if need be.
(One of the great reasons to use FX Cal or BidX is they will have "screen" captures for you assuming you update your trips at some point in the month)
Been awhile since one's been missing for me, but I do occasionally see incorrect fare data in the FOX system.