How much would it approximately cost to have a forehead dent removed? About half an inch, not very deep (Photo)

I have an indented scar on my forehead from hitting my head on a rock when i was a little kid. I would like to know how much it would cost to be removed and what procedure would be the most cost efficient and permanent? A volumizing injection? Lazer treatment? Just looking for the best and most affordable advice. I do presentations and it makes me self conscious when people are looking at it lol.

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