Do you have a hatching manual for your incubator?
What kind of incubator are you using (still air, forced air, small, large, home-made, etc..).
What is the temperature and outside humidity where the incubator is being kept? What is your altitude (it changes humidity requirements).
Where did the eggs come from? Were they all the same - or mixed?
Egg turning is required to keep the embryos from sticking to the sides. It can be as often as once an hour (automatic) to as few as three times a day (odd numbers are best - they sit on different sides during the night when not being turned).
What eggs are you setting? Different birds have different numbers of days for hatch.
I think you might want to read this topic index and see if your answers are here:
https://www.backyardchickens.com/t/...hing-eggs-important-topic-index-please-review
For troubleshooting incubation problems you can check this:
http://www.natureform.com/kb/index.php?article=1003
If those didn't answer your questions and you have specifics to share.. we can try and help. Each incubation is a learning experience, the best way to track if what you are doing works is by the hatches. If anything does not work right tweak it - until you are getting the best you can get.