Quick question about multiple layers of plasterboard

Hey Guys, Just a quick question. I'f i'm putting three layers of plasterboard on a wall or roof should I fill all the gaps between the plasterboard after each layer. Or should i not worry about it because the plasterboard gaps don't line up through all the layers. Cheers

I would do a quick fill, not tape. there's penty of info on here.

stickies, as always. I'm spending like 80% of my time here on the board telling newcommers to read the forum, fill in their profile and learn the basics. What's up with that. Read and learn.. sigh. Where the boards align, you might wanna use mud or sealant to close that "gap" (if there is any)