How do I pay taxes on packages from overseas in Korea?

Hello! It's been a little over a year since I started living in Korea. I am currently living in Itaewon. I received a package from my parents, but the amount is over $300 so I think I have to pay taxes. I've received letters before, but this time it's a package and it's going to take about 10 days, so I'm worried. Does anyone know how to pay the taxes? I tried looking on the customs website and asked, but I didn't get a clear answer. Please give me some advice! If anyone has had a similar experience, please let me know. Thank you so much.