Can i correct gstr3b mistakes in gstr1and2

if i filed JULY-GSTR3B & AUGUST-GSTR3B as NILL, but; later realized that i had some NON-GST/NILL-GST/EXEMPTED-GST/as-well-as_RCM-GST purchase-receipts then; 
can i input them in JULY-GSTR2/GSTR1 & AUGUST-GSTR2/GSTR1 resepectively, even-though; i filed NILL GSTR3B for JULY & AUGUST ??