Hmm depending on how I count them, 2-4.
I'm only actively working on my current comic on Tapas atm (as drawing it takes up all of the spare time I have to dedicate to art).
BUT slowly in the background I'm also working on the writing portions of the 2nd season of said comic (which, due to my series being episodic in nature, is like a separate story in my mind) as well as a longer separate series.
And then the 4th I probably wouldn't count, I'm involved in a small collab project that's kinda stalled out atm lol. So if we restart then yeah, but currently I'm not really "working on it", per se.
I toggled 2 to be conservative (Current comic (+ S2) & The other long form one).