Demand details not available at AO

ITR filed for AY 2015-16 before due date. Tax was paid by by TDS. But the deductor filed the TDS return in AY 2017-18. Now I received a notice from AO to pay the demand of Rs 3290. But my original Tax liability is Rs 3222. AO has no idea about the difference. I haven't received intimations u/s 143(1) since the return is filed offline. What should be done further?