How to remove Extra Fees if shipping method pick from store?

[Aveeva]

I am using extra fees extension, if customer choose shipping method : Pick from store how to remove Handling fees(extra fees extension).

What event used to check if customer chooses to pick from store in checkout page, if customer chooses to pick from store how to remove or hide handling fees.

If i use https://stackoverflow.com/a/40486717/11697039 what is my event.

How to solve by using observer?