ITC claim benefits in Annual Return

ITC cannot be claimed in Annual Return.

Only possible through GSTR-3B

Though you can not claim ITC in annual return. You can set off the unclaimed ITC with unpaid liability as it is a revenue neutral situation for the government. However, this is subject to litigation. There are favorable judgements of Supreme Court in the erstwhile regime.  

Narmada Chematur Pharmaceuticals Ltd [2005 (179) E.L.T. 276 (S.C.)

No sir. No judgement in the GST period.