If nothing was unclear or difficult, say so. Skip questions about steps you did not experience; use not applicable where appropriate.

Which detail was difficult to provide?
What information did you repeat?
What would simplify the request form?

Author notes / illustrative keys where applicable:
1. Use this answer to locate the part of the experience that needs explanation. The example issue to investigate is: customers repeat information already in their request.
2. Repeated details can locate a broken handoff between the initial form and later support conversations. Check which context was already available before adding fields; some repetition may serve legitimate verification.
3. Locate an avoidable field, repeated entry or unclear instruction in the initial request form. Check the purpose of that requirement before simplifying it, while retaining necessary verification.