Q.I Cut My Holly Trees Back Too Much HELP{
leaves turning yellow then I went inside and cut a lot also on the top will they come back??

Certified GKH Gardening Expert
They will come back, but unless you corrected the reason behind the yellowing, it will return also.
Unfortunately, your images didn't come through so I am unable to determine the cause of yellowing. There are many causes.
Some of them include- overwatering, underwatering, iron deficiencies, nitrogen deficiencies, calcium/magnesium imbalances or deficiencies, and insect pests.
In the meantime, here is an article to help you with more reasons why these symptoms occur:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-yellow-leaves.htm