11 May 2017
Notice u/s 154 is an opportunity of being heard to you whereby you can oppose the invocation of section 154. If you are sure that there is no TDS mismatch as per 26AS then you can file response to section 154 notice by attaching a copy of form 26AS and saying that since entire TDS is reflected in 26AS there is no mismatch and hence section 154 cannot be invoked.
11 May 2017
You can go on incometaxindiaefiling.gov.in and apply for rectification u/s 154 by choosing option that no further correction. Until u file rectification, this notice not resolved by deptt.