adjustment u/s 143(1)(a) of income tax Act

one lady assessee file her return for AY 17-18 manually show only pension income and give tax as per firm 26AS later on it come to the notice her saving interest as well as not mention in return, then she file revised return and mention pension, all interest and claim TDS and also deposit self assessment tax. but department send notice under section 143(1)(a) of income tax Act for Adjustment and mention reason that u have not show interest as well as TDS as per form 26AS.