If you applied for and converted your tourist visa in-country, you are no longer on a tourist stamp but on the initial 90-day Non-O visa.
If you are having problems opening a bank account while on the 90-day Non-O, you can still apply for a one-year extension of stay using the same affidavit letter from your embassy confirming your income. After that, you should have no issues opening a bank account.
You’ll need to leave to cancel your current stamp and re-enter to activate your Non O visa. You can’t convert any stamps as you already have a new visa.
For the family VISA, which means a 90 days Non O based on marriage or having a Thai child, you may apply for the regular one year extension of stay OR a 60 days family EXTENSION visiting thai family.
If you’re on a 60 days tourist visa or 60 days visa exemption and also are married to a Thai or having a thai child, you can also apply for a 60 days family EXTENSION visiting Thai family.
Converting a driver's license is quite easy! Just make sure to bring an International Driving Permit (IDP) as well. Allows you to drive for 90 consecutive days in Thailand in first place too.
You could play safe and apply for a 90-day Non-O visa if you meet the requirements. Then you won’t need to worry about an onward ticket within 60 days or an extension.
If you apply for a 60-day single-entry tourist visa, it is possible to obtain a re-entry permit at the immigration office or at the airport. This permit allows you to re-enter Thailand under the same visa and continue your permitted stay within the original 60-day validity period. You can also apply for a 30 days extension.
If you are eligible for a 60-day visa exemption, you will instead be granted a new exemption upon re-entry. Nevertheless, obtaining a re-entry permit may serve as an alternative to avoid multiple separate entries under different tourist visa arrangements.
If you have already been denied entry on the grounds that the immigration consider you to be misusing tourist schemes in order to obtain long-term stay in Thailand without the appropriate visa, the issuance of a tourist visa will not in itself guarantee that you will be permitted re-entry as a tourist. In such circumstances, I would recommend engaging an agent who provides so-called pre-scan or safe entry services, as they assume responsibility for your application and guarantee admission should they accept your case.
Thank you. If you’re having problems with opening a bank account @rudi you can apply for the one year extension of stay with a income affidavit from your embassy if you can meet the required minimum 65K baht a month without opening a bank account.