My 90 day report was originally due 30 January 2017.    However, i successfully extended my retirement visa on 5 December 2016.     Is my next 90 day report still due on 30 January, or is it now due 90 days from 5 January 2016?    thanks, 

forgive the error!    i meant is the 90 day report now due 90 days from 5 December 2016

A extension application does not reset your 90 day report date unless they gave you a new 90 day report receipt when you did it.

It seems your report is still due on January 30th.

Yep January 30th unless they gave you a 90 day receipt on December 5th when you applied for the 12 month extension.

"However, i successfully extended my retirement visa on 5 December 2016."

 

Immigration was open 5 December? 

Yep. Closed on 5th Dec.
Father's Day.