Dont worry akhilesh. you show all your turnover in income tax returns. it wont lead to additional GST payment as non reporting of exempt turnover in gst return does not usually have any impact on gst liability except in case of apportionment of common itc.
you may want to consult some expert about common itc apportionment. if you had any common itc then it would be better if you didnt show your exempt turnover in itr