I intend to use a tascam tm-2x stereo microphone with a canon 550D.
The tascam tm-2x requires plugin power. The canon 550D has standard no plugin power.
Can i give a microphone plugin power with magic lantern version 2.3 installed on a canon 550D?
No. That would require additional electronics. ML is only software. You'll have to buy a preamp that provides mic power.