** Shares of Indian Overseas Bank IOBK.NS fall as much as 5.8% to 41 rupees, lowest since December 21, 2023
** IOBK eyes its third straight session of falls
** The lender got tax demand from Deputy Commissioner, Chennai for liability of 7 billion rupees ($80.15 million)
** More than 8.7 mln shares change hands, 1.7x its 30-day avg
** Stock down 16% so far this year
($1 = 87.3360 Indian rupees)
(Reporting by Ashna Teresa Britto in Bengaluru)
((AshnaTeresa.Britto@thomsonreuters.com ; ( +91 8078332441))