Questione giuridica chiave
Whether the taxpayers breached their duty to cooperate by failing to timely produce books and documents
Decisione estratta
Yes. Repeated missed deadlines and only late, incomplete responses amounted to a clear breach of the duty to cooperate.
Motivazione estratta
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.