GSTR1 is essentially a detailed report on all of your outward supplies, EWB is a sub-set to the GSTR 1 carrying details of only those outward supplies where there is movement of goods over and above a threshold limit.
The taxpayers and the GST authorities have had multiple encounters with such technical glitches, which has led to erroneous or missed filings. Thus, in order to address such issues on the GST portal, an IT-Grievance Redressal Mechanism was introduced in April 2018.
Understanding genuine hardship to taxpayers, CBIC has issued a Circular No. 110/29/2019 – GST dated 3rd October 2019, wherein it provided an option to re-file refund application if taxpayer has inadvertently filed NIL GST refund application.