Im trying to unscrew a Delta Peerlees for my shower but its not unscrewing. Any advice?

How can I upload a picture?

Unscrew what? Photo posting-Look at where you can post an answer "Quick Answer".
Underneath that box is a sub box-"Go Advanced". Click that and follow directions. You can also save your picture on your computer. Go to Quick Answer, tell what part you are trying to unscrew and then copy and paste the photo from your computer.

Once you go advanced, select "insert image" icon. You will be asked to ID the photo file on your computer you want to upload. Go from there.

Indeed, a picture would help a lot