Hi everyone I am planning to apply for a one year extension of stay. (I'm sorry in advance if I'm wrong in professional terms).

My permission to stay expires on my O A 13/3/2021.

My visa will expire on 9/10/2020.

1) How long in advance can I extend my visa? Will it be from 9/10/20 or from 13/3/21?

2) Is a request for multiple entries made on the same day?

3) In CW, how long in advance are they willing to get the approval from the bank regarding the 800k (? My branch in Bangkok Bank explained to me that they issue the certificate after a few days from the date of application).

I would happy get some advice from the experts.

Thanks in advance.