Can someone help me make the dent?

Hey guys! So this is my first time making the helmet and I was wondering how I can make the dent? (The Helmet looks like it's bumpy because I put sealer on it)
Thanks to anyone who can help!

Take a look here. Rafalfett has a good template and some images. You will basically have to cut out the shape (using the template) and sculpt the dent back in. (I know I'm over simplifying it.)

http://www.thedentedhelmet.com/f23/rafal-works-helmet-rwh-v2-helmet-templates-build-45938/

RafalFett definitely lays it out well. I added my dent by covering the hole with a large strip of masking tape. How i did it was. Cut the hole. Loosely lay the masking tape over the hole using a finger i pushed it down the desired depth. Secured the tape along the outside of the dent, and used filler inside the helmet laid on top of the tape.