Credit note under gst

Yogesh Gupta (143 Points)

07 December 2020  
Goods Sale bill issued on 10/10/2019 but due to some reasons credit note issued on 04/08/2020. 1st Situation : So my Question is that can we reported the credit note and reduce sale amount of Aug 2020 in Aug 2020 GSTR-1.
2nd Situation : if we issued credit note on 15/10/2020 then can we reported the credit note and reduce sale amount of Oct 2020 in Oct 2020 GSTR-1.