The department has served a "questionnaire" on Reddy in respect of the expenditure incurred during marriage functions of Bramhani with Hyderabad businessman Rajeev Reddy and asked him to reply to it on or before November 25, officials said.
The department sleuths, comprising a five-member team pored over the records at the Obulapuram Mining Company and Associated Mining Company owned by Reddy and his family in his hometown of Ballari, they said.
In Bengaluru, the Income Tax department conducted surveys on at least 10 locations of high-end event management firms, catering and multi-media service providers who were engaged for the extravagant wedding.
Officials said the tax men visited seven locations here and three in Hyderabad of the event management companies which were given contracts for the wedding.
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In the three-page questionnaire served by the department, Reddy has been asked to furnish the details about the various functions conducted pre-marriage and post-marriage.
The questionnaire has sought details on the programmes managed by the event management and the expenditure incurred or likely to be incurred on various components such as catering, flowers, wedding decorations, entertainment and music, transport, accommodation, security, venue and photography and videography, officials said.