ya Johnny pretty much said it all.
Run everything to your Master bus, then the Master bus feeds the hardware output.
 
However, you don't always have to route all your individual tracks directly to your Master bus though.
For example, its okay to sub group (send all guitars, send all drums, Exc) to a Bus group.
but then that bus group goes to the Master bus / Ala then the Hardware bus.
 
This often how I set up my Desk:
 
All kit pieces (Kick, snare, toms, exc) are going to a bus called: "Drums" bus
All my guitars (Except Acoustics ) are going to my "Guitar" bus
All my vocals are going to my "VOX" bus
And so on and so on...
So all these Buses are then routed to the Master Bus (Then Master goes to hardware bus, Your Tascam)
 
This way when there is a project with 40 tracks you have a little control.
It also helps when you can "Mute" a Drum bus to mute all the drums to zero in on areas.
Its all about preference really. Some buses only have an FX in them (Reverb) this way you can have a send on a vocal that feeds the reverb bus.
 
That is the basics in a nut shell right there.
Later on you can experiment by routing another bus off your master bus.
I do this for metering purposes during Mastering and Mix Downs. because if you put Waves Peak on the default Master bus it wont be true. but don't worry about that right now.
Good luck