There are a number of very very good flight planning systems (that are also very expensive!)around that require just a telephone line for the connection but mainly aimed at a commercial operation. I know of no website that GA a/c are able to file plans. Would be interested to hear if there was ????
Yep, fuel drawback still available...the forms should be in any good flight planning area and all intructions are on the back with address to send it to.