Where does client-provided data (like tax documents) actually reside within this multi-tool setup (Air Table, Assembly, vibe-coding app)?

The question was raised about where client tax forms and provided documents physically reside within the overall system architecture. The response was cut off mid-sentence at the end of the segment ('that is in. So actually we just switched over uh I was using assembly for uh for...'), so no complete answer was captured in this segment.