How to identify neutral wire in multi-switch box?
You may or may not have any neutral wire in the box, depending how it's wired.
With switch loops (which you can't do legally now, but could for a long time) there's quite often no neutral. Assume any white wire connected to a dumb switch is hot from a switch loop.
Otherwise, with dumb switches, look for a bunch of white wires not connected to the switches, but connected to each other.