Your documentation skills must be superb as an occupational therapist or anyone working on a multi-disciplinary healthcare team. What you document in the patient's chart will be seen by others treating the patient and will be the basis for how future treatment and tests are administered to the patient. Also, the patient's chart is considered a legal medical document. If anything ever happened to the patient and malpractice charges were brought against you and the team, everyone's documentation must be perfect for helping with the defence.
The interviewers want to hear what feedback your managers and mentors have given you regarding your documentation. If you were told your documentation skills needed improvement, describe what you did to improve. If you were told your skills are excellent, be sure to let the interviewers know. This is not the time to be humble and downplay your incredible documentation skills.