Normally multi-engined taildraggers use independent engine control for turning (i.e. increase power to the left engine(s) to turn right and vice versa) in conjunction with the differential brakes.
Some also had the tailwheel directly connected to the rudder so that turning the rudder also turned the tailwheel.
If you are not using rudder pedals with toe brakes (which I suspect from your comments) and only have a single throttle it can be difficult to turn these types especially if they only have a castoring tailwheel.
Open up the aircraft.cfg file in Notepad and scroll down to the [brakes] section and check to see if this line is present:
differential_braking_scale = 1If it is not there then copy and paste it in place and save the file (with the same name of course).
Note: You will have to make the change to the aircraft.cfg files for ALL the variants.
The above line allows you to apply rudder and then when you hit the brakes only the corresponding brake will be applied which basically gives you the ability to use differential braking without having toe brakes on rudder pedals.