CoA has not announced a NATA 2027 answer-key, response-sheet or objection schedule. The 2026 brochure describes an adaptive aptitude test and a drawing assessment; do not assume a conventional answer key or challenge window unless CoA publishes one for the cycle.

Check for an official key or response sheet

1. Open notices from the official NATA website or follow its linked student portal.
2. Confirm the notice is for the correct year, phase and test session.
3. If a response sheet or key is enabled, download it from the official login and retain a copy.
4. Compare only questions for which the official document provides a reviewable response or answer.

Challenge or objection process

Use an objection mechanism only if CoA expressly opens one. Follow the published deadline, question-reference format, evidence requirements and fee instructions. Save the acknowledgement and monitor the portal for the final decision. Do not pay an unofficial service or treat coaching-centre keys as authoritative.