I am playing MGSV:TPP but i want to go to motherbase sometimes instead of just wandering in afghanistan, does anyone know how I go there?
If you're on the ground, you first need to get to your helicopter. You can do this by opening your iDroid, pressing up/down on the map screen to select the helicopter pickup option, then mark the landing point you'd like the helicopter to land at. Once you've done that, go to the location you specified and hop on the helicopter.
Once you're in your helicopter (ACC), at the bottom of the right-most tab of your iDroid you'll see a "Return to Motherbase" option. It's as simple as selecting that.