Kernrechtsfrage
Whether the taxpayers breached their duty to cooperate by failing to timely produce books and documents
Extrahierter Entscheid
Yes. Repeated missed deadlines and only late, incomplete responses amounted to a clear breach of the duty to cooperate.
Extrahierte Begründung
The authority may require documents within a deadline. A represented taxpayer must request an extension in time if needed; offering only on-site inspection did not satisfy the requested production.