State tax filing

Was just the 4868 form accepted in 2016?

 

 I filed taxes by the October 17, 2020 deadline (3 year statute) and they said an extension was never filed and refuse to send my refund.

Was the IT-370 required back in 2016 like it is now in recent years. 

Yes maybe it’s true the IT-370 is required - but it wasn’t in prior years.