You can get the 90-days Non-Imm-O Visa based on having a half Thai child, by showing the birth certificate with your name on it, when applying on the Thai embassy or consulate.

However for the application for a “1-year extension of stay based on raising a half Thai child”, you will need the parential rights approved by a Thai family court. And this process might take some months to complete.

You could set the approval process into motion before you go back to the UK by June, and when you return, you can either return with a 90-days Non-Imm-O again, but also on a 60-days Tourist Visa, and from there do the extension or, for the later, the conversion to a 90-days Non-O. Money 400K in a Thai Bank account is required, and you said you are complying with.

So actually everything is a question of correct timing

you can convert the 60+30 days tourist visa to a 90-days Non-Imm-O based on being over 50, at most (not every one) immigration offices. If you find it unable to open a bank account on a tourist visa, this might be a hindrance, as the Immigration might want to see the proof of a certain sum of money having been transferred from abroad, to be able to apply for the conversion. A catch-22 situation. You would fare much better if you applied for the Non-Imm-O/A in the UK. This will allow you amble time to fulfill the financial requirements

no, he should make his new yearly extension under the old and still existing address in CW, then a week later he moves and must file TM30 in Nonthaburi

do the extension first, and complete the TM30 and change of address after or on March 31. If the lease is not sufficient and you cannot self register, hand the Immigration officer the phone number of your landlady and have them tell her about her duties & obligations. It helped in my case.

So their advice to apply for the 60-days Covid19 extension has probably a reason, they want to ensure you do not „waste“ the “60 days family visit extension”now, as you can only do it ONCE on a previous entry. They actually might wish to help you to push your stay permit date further into the future, since they obviously know that you cannot meet the financial requirement for another “1-year extension of stay based on marriage”. They offer you to do the Covid19 extension for as long as it is possible to aquire

@Michael *******

doesn't apply to him as the current Covid19 extension scheme is bound to run until march 30th

@Lucky ****

. . . the immigration officer actually tried to be helpful when he told you to visit on he day your Tourist Visa extensions runs out. The reason might be that if he issued the extension today, he would have needed to start the 60 days from today. He lets you apply for it on March 4th, so the 60 days will start on the March 4th. Thus he actually wants to ensure you receive the full amount of the 60 days Covid19 extension and don't lose any days until march 4th

You have not extended a „visa“ by 30 days, this is wrong wording . . . .you have extended the „admitted stay permit“. An “admitted stay” from a 60 days Tourist Visa can only receive a 30 day extension once

What you could do, visit Immigration and ask them if they are willing to give you the “60 days unable to fly due to Covid19” extension, before this special extension for people “stuck” in Thailand runs out on March 30th.

However be aware if they grant you these 60 days, they will count them from the date you apply for

or apply for the 90-days Non-Imm-O based on marriage on an embassy or consulate in the USA. Finances can be either in a Thai bank or a US Bank on the date of application. Then after 15 nights quarantine, open a bank account and transfer the required 400K THB. They need to have seasoned for 2 months on the date of the application for the "1-year extension of stay permit based on marriage"

or fly back to the States, apply for the 60 days Tourist visa at the embassy or general consulate in the USA, and the COE fulfilling all the requirements. In Thailand, before the 30 days extension of the60 days tourist visa runs out, apply for the 60 days "visit family" extension, This would give you 60 plus 30 plus 60 days for transferring 400,000 THB into a newly opened bank account in your sole name, and let it settle long enough. Then converse the "visit family" to a 90 days Non-Imm-O based on marriage to a Thai at the Immigration inside Thailand, and from there change to the "1-year extension of stay permit based on marriage with a Thai"