Notice u/s 143(2) for detailed assessment

ITR was filed u/s 44AD (presumptive taxation). Now notice has come u/s 143(2) and it is asking to submit any evidence relied for filing return of income. No specific documents have been mentioned.

1. What kind of documents should be submitted. Detailed accounts were not prepared as the return was filed u/s 44AD?
2. Can we submit a response just asking for more clarification on data / document needed?
3. Can the AO ask us to prepare detailed accounts and file financials in such cases.