ITC difference

there is a difference between 3B itc and GSTR2A Itc but what I claimed itc in 3B with proper documents.but the suppliers not filed their return properly. difference showing 18k. I informed suppliers to fill gstr1 but still no response, if i file the annual return what about the short fall itc.pls advice
because itc compression list too late
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The mechanism of ITC availment comparison on the base of GSTR2A is not fair and not in line with GST , as GSTR 2A is just a auto-populated report and not a return.

 

Where are valid invoice as per rules is available , then one can file annual return based on which is availed in GSTR 3B. Shortfall shall not be disallowed.