Section 7(2)(c) in The Gujarat Panchayats, Municipalities, Municipal Corporations and State Tax on Professions, Trades, Callings and Employments Act, 1976
(c)If the employer fails to comply with the terms of the notice, or if in the opinion of the prescribed authority the accounts and papers are incorrect or incomplete or unreliable, the said authority shall, after such inquiry as he deems fit or otherwise, assess the tax due, to the best of his judgement.