How do you resolve tax issues related to foreign income in Korea?

Are there people who are confused about the tax treatment of foreign income in Korea? I am currently experiencing a similar situation. I run a business overseas, and during the recent process of renewing my visa, a Korean lawyer explained to me that I might need to pay taxes in Korea on my worldwide income. So, I ended up signing some related documents, but this process is very confusing. It would be a great help if anyone could share advice or experiences on how to resolve tax issues related to foreign income in Korea. I am particularly curious about the procedures that others who have had similar experiences followed to address this issue. If you consulted with a tax accountant or expert, or if you could provide information on what documents were needed, I would greatly appreciate it.