I did try and tell you
https://aseannow.com/topic/1348917-thai-tax-tangle-expats-warned-of-new-rules-on-overseas-income/#comment-19515691
It's not about Thailand. It is about International treaties.
Here is the UK's foreign Income Tax form.
6 pages long, covers all types of foreign income, income tax paid abroad and DTA's.
https://assets.publishing.service.gov.uk/media/6602c41265ca2fa78e7da897/SA106-2024.pdf
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