okay we ascertained that the O/P and their spouse are on Non-B and Non-O visa yearly extensions of stays that they got at Chaengwattana from Non-B and Non-O visas
The children are on overstay from visa exempt entries
They also only have ONE of the old passports that was returned to them when they got new ones, the canadian embassy gave back the old passport, the US embassy would not,
I believe they will have to go FIRST to IT Square Laksi Plaza to "recover the entry stamp" and to get another stamp and after that you go to Chaengwattana to get the extension stamps recovered
IF you are on the Education Plus extension (which is given to people after they complete their degree program to give them a year in country to look for work) you are supposed to be able to change to employment inside the country without leaving to get a Non-B at a thai consulate
You'd have to talk to your university, your new employer and your immigration office where you have the extension issued to see how the process actually works.
You'll get in on the current extension/re-entry and stamped until the 30th of April because Immigrations at passport control can't tell a work permit was cancelled when you stamp in
BUT
You sure will run into issues when you go to do anything as far as your new employer once immigrations finds out your work permit was cancelled back on Mar 31st.
You will get in though and stamped until the expiration of your current stamp/re-entry permit
As a rule you do a 90 day report at the immigration office where you got your extension issued. BUT as long as you have a TM30 filed where you're staying, at least in theory you could file a 90 day report at the immigration office serving that area.
Remember you can do a 90 day report in person from 2 weeks before the due date until 1 week after the due date (a three week window to report) so you might be able to coordinate doing it where you have your primary residence / got your extension
As a passport holder from India you could come into thailand on a 60 day visa exempt entry and I believe have no issues visiting a supplier without having to have a Non-B visa.
They do issue a Non-B visa for the purpose of "doing business in thailand" and you could apply for that category though and the requirements are not too difficult to meet
Should be able to go get the year transaction print out, the standard bank letter and then update the bank book the day you go to apply for the extension.
Most offices allow the bank transaction report and letter to be no more than 7 days old
Post in a Hua Hin specific group and ask your questions too, that way people down there can weigh in
I am doubtful you have ANY visa at all at this point and I would almost bet dollars to durian if you looked at your passport you'd have a stamp that says "extension of stay permitted until" that you got from the immigration office inside thailand. <- That is NOT a visa, 🙂
There is no issue applying for a DTV while you hold a valid extension of stay, (no matter if you cancel it before you go to apply for the visa or not, it won't affect the application)