11 April 2019
Yes , You can do vide Table 9A of GSTR 1
In terms of Order No.02/2018-Central Tax dated 31st December 2018, rectification of error / omission in respect of Form GSTR-1 for the FY 2017-18 would be allowed till the due date of furnishing of Form GSTR-1 for the month of March 2019 i.e. April 11, 2019.( Extended till 13 April 2019 )