Give them a little more time. Always candle and tap on the egg before tossing it, sometimes they are still alive and stuck. Sometimes stuck chicks don't make it, but sometimes they bounce back amazing and you can't even tell which one it was afterwards.My first time incubating, had several dozen quail babies hatch over Sunday (day 17) and Monday (day 18)!!! It was like Christmas, don't think I slept much at all the last two nights. I'm quite relieved as I had some issues with the humidity pump and thought maybe I would lose the whole hatch. I was literally on BYC searching "Day 17 no movement or pipping" when I heard cheeping from the incubator and realized that the first egg had hatched. Didn't get the second one for almost 10 hours, and a bunch more hatched over night. I still have a bunch of unhatched eggs. No movement or pipping all day as far as I can tell. Today at 2 pm will be Day 19. Should I leave them in for another day or two, or assume that they'd have hatched with the others if they were still viable?
If you feel up to it, if there's no response to the tapping and no movement when candling, gently open the egg in the air cell part to see if the chick is alive or dead. Knowing the progress of eggs which didn't hatch can help you determine how to change your incubation method for future hatches and get a higher hatch %. Keep a journal and write down data from each hatch as it progresses and final tallies.