Extending a lease questions?

Hello all! Been lurking awhile and finally at the point where my lease is up in one more month. Sadly… It looks like I missed all the good end of year and leftover deals. I’ve been shopping the Honda accord, Toyota camry, lexus nx, and acura tlx, but there doesn’t seem to be any great deals going on this month. So I am contemplating extending my lease. My thought is to simply wait for a better month to lease. Am I wrong in this process? Or even worse, are there no more good leasing months left until the new models start coming out?
If I were to extend my lease is that something I just call my leasing company to do? Is there a fee to do this or any negative reasons why I should not? How long can I extend for?

Thanks for the help and input guys!