Having a ball using Glide!!
Is there a way I can link a button to an existing form that is linked to different sheet?
E.g. Once someone has completed their profile, I would like them to be able to take the next step of creating a business listing. I already have a form for this attached to the business listing sheet.
I don’t think so. The nice thing is that you can have different form layouts for different buttons that write to the same sheet, but I can see your case of wanting to use the same form. Unfortunately, I think you may just have to recreate the same form layout twice.
Thanks Jeff. That’s what I’ve done. Just thought I’d check 
There is a feature request in the feature requests app (from me) for the ability to save forms as layouts. Check it out and vote!