You can simulate trips in the overview screen at any time. The forms for trips that have not yet been accounted are given the remark 'simulation'. Those for accounted trips have the remark 'test printout'.
The actual printout of a trip has until now only been possible by calling the standard form for trip costs accounting (RPRTEF00 or transaction PRF0). In this case the trip is given the status 'trip printed' and no remark appears on the form.
As of release 4.0A, you have the additional option to obtain the actual printout of a trip in the overview screen via the function 'Print'.