All My Dear., The date of August month GSTR 1 2 and 3 returns date not yet to be finalized... Also it's not updated in return dashboard.. You are any doubts please see the dates in GST portal Home page window's Right side bottom corner. It's shown as TBU...
In my view, The July GSTR 1 2 and 3 dates ended on Nov-10th... So, The August return dates available after 10th November... Bcoz, then only our July ITC / other C/f to August returns...