Hi there, On the Inventory Transfer page, I have a custom column named "Available Inventory" and I need this to auto populate the available inventory amount based off of the inventory chosen. How would I do this? Thank you!

Client script, using a field edit trigger based on the line item field. You can get available inventory through an item saved search.

Would this be possible doing a workflow? I don't know how to create scripts

I don't think so :/