Query for GSTR-01 APRIL

vikram kerekar (1241 Points)

21 May 2018  
Aggregate Turnover for which Previous Year 2016-17 or 2017-18 ? to be shown when filing April GST-01?
Also, April-June 2017 turnover already shown in returns filed July onwards. So why is the same information asked when filing APRIL GST-01?