Mistake in revised vat return

Sir, we have filed Monthly VAT Returns for New Client , in January client have given purchase invoice of July2015 which he forgot to give for JulyVAT return ,forthis we have revised his return from Julyt to december, but due to mistake of one of our Staff still Some defects in return are there , like Purchase Invoice amount is less entered due to which ITC is less Claimed. 

So i just want to know that is there arise any problem in future .When it comes to the Knowledge of Assessing Officer .