state of nj tax filing extension

i applied for an extension for federal since I am waiting on a corrected W2. I see it says I do not need to file an extension for the state as it automatically applies. So does this mean I do not need to do anything?

 

I was getting a refund from State but elected to have the refund applied to estimated taxes. I will be making my estimated tax payment on time but it already includes the refund deducted in that amount. Anything I need to worry about since the refund wont be applied until I file in a few more weeks?