If you're asking if there's a member of Thai Immigration in the group to give official advice, no. They're available by phone or by calling into your local Immigration Office. But there are a few experts in this group who know the rules in great detail. You can look up who the group admins and mods are

@Roberto ********

Well done, you're learning to be a useful netizen

@Roberto ********

Not "totally incorrect". Not "each individual is different". I'm not a "tax agent" let along an "unscrupulous" one.The OP indicated she would be in Thailand 180 days. What I posted entirely fits the OPs situation and answers her question with facts. You should try it.

@Roberto ********

Paying tax at home on your income does not excuse you from paying tax in Thailand. Your country's DTA may allow you to exempt certain types of income, or at least use tax paid at home to reduce what you need to pay in Thailand. The very low tax-free allowance in Thailand means many people with a relatively low income, who do not pay high rates at home, may not have paid as much tax at home as is due in Thailand.

Here are the Thai income tax rates. If you stay 180 days you become a tax resident. Any money you bring into Thailand is assessable for potential tax. If your country has a Dual Taxation Agreement with Thailand, it may provide you with exemptions and allow you to off-set any income tax you paid in your own country. Look up the Thai Revenue Department for where you live and go see them for advice. You may be entitled to additional allowances in Thailand, which they would tell you about. They will not try to get money out of you that is not due. In fact I've now seen several reports where a rough assessment of income, like just a pension, led to a decision that they didn't need a TIN or submit a return.

why not just walk in and ask them, for free other than the 1,900 baht official fee

@Don ********

OK thanks Don, I didn't know that

I saw that with the OA, but not the O. No one in the UK can provide the medical certificate needed for that visa

Why do you want to open a bank account? You need a long term resident visa to open a bank account. Tourist visas not acceptable.

It's unlikely you have time to get a UK visitor visa. Focus on a Schengen visa. Use it to visit Ireland then quietly head to Belfast for a ferry