Hello and thanks in advance for your responses.

I arrived into Thailand on 15 October on a 90 day non-o based on marriage. As I had to serve quarantine followed by having to wait 7 days to get a residency certificate to open a bank account I will be in a situation whereby the 2 month seasoning of the 400k will only be achieved around 5 days before my 90 days are up.

Hence my question is for the extension of stay can I go to immigration and apply with only 5 days before the last day of my visa.

If not, what options are available - I understand that are 60 day extension based on Thai family is possible.