Doing Transcription Virtually Question

Hello,
I have had an inquiry if I offer transcription and I said that I have and would be able to offer them this. My question is I have only done transcription with the tape, headset, etc...which I have the equipment to provide this service. What I'd like to do is offer it where I don't need the tape and move virtually. I believe I have read that there is a way to do this. If anyone know how this is done, the software/equipment needed and approx. what it costs I would greatly appreciate it.

Any info would be wonderful on this. Thanks.