Do tax residents in Vietnam have to pay income tax on foreign salary/remote income?

This is a complex topic best discussed with a lawyer rather than in a chat group — the legal details weren't covered here.

If you're a Vietnamese tax resident for several years (e.g. 3 years) at a 15% tax rate, the accumulated amount owed can be substantial — enough to become a bargaining point with tax authorities.

This falls under tax authority jurisdiction, not police enforcement — the exact collection mechanism isn't entirely clear.

In practice, salary tax is usually only collected from tax residents, and widespread enforcement hasn't been seen yet — though this is likely to change.