When you’re setting up a client in your systems for the first time, it’s tempting to ask up front for everything you will need for the journey.
Resist.
If your tailor is making you an overcoat, you don’t expect them to measure your inside leg.
Only ask for what you need right now, to get the client started. Otherwise you’ll overwhelm them with unexpected (and to them, unnecessary, perhaps even unnerving) work, to get information that may well have changed by the time you actually need it.
Keep your information gathering aligned with what you’re doing together. That keeps it feeling natural, and you’ll have all the right information when you need it – just in time.