can removing a tempered glass protector damage my screen
Screen help could takin a glass protector off my iPhone 6 damage my phone in anyway
If it is removed carefully, starting at one corner, it should not damage the screen. If the screen is already damaged, the screen protector could do further damage if it is removed by pulling out pieces of already-loose glass.
If you're not comfortable removing the screen protector, you might want to check in at an Apple Authorized Service Provider for assistance.