Sungkeun

Hello. I am curious if there is a way to pay the capital gain tax for 2024/2025 tax year in advance. I have worked in UK for 5 years and thinking of permanently leaving UK, i.e. permanently going back to my country South Korea. Before moving, I sold all my stocks I had and I would like to send all my money to my Korean bank acount. The problem is the tax for the capital gain of the sold stocks. I sold it this month (Aug), so its tax should be payed in the 2024/2025 tax year, i.e. after the Apr 2025, if I understand correctly. However, at that time, I will not be in UK, so it may not be easy for me to send the huge money online. Using the 20% tax rate, the tax I should pay is more than 30K pounds. This is not small amount of money for me, so I would like to avoid sending them internationally in the future. If possible, I would like to pay the related tax in advance before I am leaving UK. Could someone give me an advice?