I know mine was mailed in.....Did not know they could E-file tests....
it seems to vary, depending on which VEC org. is used.
ARRL VE's use only postal mail/ups/ect to send results (and other required information) to the ARRL HQ (not the FCC).
dunno about other (LAUREL/W5YI/ect) VEC's S.O.P.