What ??? ...
You really did this? My fear is always that even when you try renewing early, some dope at IRS will louse it up or lose it or otherwise foul things up. Since they generally can't solve anything in less than three months that would leave you without a renewed number until after the start of tax season.
I figured that the IRS EF people might not process your returns if the number wasn't renewed. But you're saying you didn't get renewed last time, filed as usual, and EF gave you no problems - is that right?