You can't avail INPUT TAX CREDIT ( ITC ) on Construction of an Immovable Property ( Works Contract ) as it is specifically Blocked u/s 17(5) of CGST Act 2017.
Query Regarding Debit note by receiptient /buyer:-If we returned Material( Purchase return) due to damamge,Relpacement,Quality issue, to the supplier by raising Debit note .. and if Supplier give us Credit note in next month in such case Can we reduce /Reverse ITC credit in GSTR-3B in current month return or Post these debit note till the time when supplier gives credit note?