Is There a Thai immigration app you can apply for the TM-6 entry and exit stamp or just a link? What happens if you cannot do it 3 days in advance ,only 1 day in advance because of my work schedule offshore ?

I am a US citizen currently in Chiang Mai on an ED visa. Stamp expires June 6th.

I mailed my passport and application packet to the US embassy in Bangkok last week for passport renewal. It is a few years early, but roughly 8 pages left so I wanted to do it now.

They said I should receive my new passport (and old passport) to my Chiang Mai address in 3-4 weeks.

My question is, is there anything I need to do at Thai immigration once I receive them? Do I need to have a stamp transferred to the new passport? New TM-30, TM-6, etc?

This was written at the bottom of the renewal instructions website when I was doing my application:

"As of April 10, 2023, the Embassy/Consulate will no longer issue passport linkage letters with newly issued passports. If a Thai government office requests one, your cancelled passport and your newly issued passport will suffice."

I'm just not sure what, if anything, I need to do with my passports at Thai immigration, or, if after my ED visa is canceled, do I just exit the country with both passports?

Thank you for your help, my Google searching hasn't found me the answer. Might be searching the wrong terms.

Owner trying to register me for tm-30. What do they put for the tm-6 since we aren't issued it on arrival?

Which documnts do you need for thefirst extra 30 days?

Hi, my (USA fwiw) COVID-extended Tourist visa expires this week. I have an appointment at Muang Thong Thani but am enjoying Koh Lanta.

Is it possible to extend in Krabi or Trang w/o TM-6 (left it in old passport in BKK)?

Possible but foolish/unwise/inadvisable?

P.S. is 30 Mar still the final ext date?