How do I remove scratches from glass?

No way to remove them. You can "hide" the scratches with auto paste wax.

After thoroughly cleaning and drying the surface, apply a dot of white, non-gel toothpaste (preferably containing baking soda) to a damp, lint-free cloth. Using small, circular motions, rub the paste into the scratch for about 30 seconds. Wipe off the excess toothpaste with the cloth, and inspect for signs of improvement. Reapply the paste as many times as needed to minimize the scratch’s appearance. Finally, give your newly pristine glass a once-over with a damp cloth to clean off any residual paste and restore its natural sheen.

Here is a good article. Hope it works. https://www.wikihow.com/Remove-Scratches-from-Glass

Where is the glass?

Hello Becky,

It maybe possible to run the lead of a pencil to fill the scratch, other than that maybe a Car windscreen repair shop might be able to help you.

I don’t know if this would work for glass but I have used toothpaste for my headlights to clear it up. It is slightly abrasive but not too much.

Glass is very difficult to polish.

Your ATV's windscreen is probably laminated glass.

If it's a Lexan or other plastic, then the scratches can be partially polished, but not gouges from tree limbs and flying gravel.