Dr Pankaj Gupta, the director of popular coaching institute 'Brain Master' was arrested yesterday in this connection, according to a Customs release issued here last night.
Gupta was produced in a court of magistrate Raghvendra Singh, who remanded him in three-day police custody.
This is the first strong action taken by the Customs department in connection with tax evasion in Indore zone.
The department had on March 31 raided the institutes's offices at Ratlam Kothi and Vidya Nagar and seized computers and some documents.
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After the probe, the director of the institute had deposited Rs 15 lake cash and a cheque of Rs 1.35 core.
The department had received a tip-off that Gupta, and some other officials of the institute had allegedly not disclosed their real income and amassed huge wealth.