Section 6484 Of Article 2. Deficiency Determinations From California Revenue And Taxation Code >> Division 2. >> Part 1. >> Chapter 5. >> Article 2.

. If any part of the deficiency for which a deficiency determination is made is due to negligence or intentional disregard of this part or authorized rules and regulations, a penalty of 10 per cent of the amount of the determination shall be added thereto.