question only for experts

Kumar Gogia (49 Points)

19 August 2017  
registration certificate shows date of August as validty from
but some purchase has been made in July from registered dealer and also some tax invoices issued and told customer that GST no. will be provided later and now I got GSTIN and provided to debtors and creditors

now my question is will I get ITC on my purchase of July and my customer on their Purchase from me?
every different CA has their own opinion