If you mean submit a tax return I was told I only needed to do one if I had assessible income for they year. I am tax resident in Thailand with a TIN. I had no assessible income in 2024 so no need for a tax return. I brought no money in from outside Thailand.
Have a search of posts. There have people been rejected for courses too short. Certain Embassies have also issued a METV instead of DTV due to course length.
Depending on circumstances it can take 10 to 15 working days. It can be quicker but yiu should make allowances for the longer times. As for Visas I would advise looking in the Vietnam Visa Facebook groups. Agents post in there and can offer advice depending on passport held.
Anonymous participant 686 Will it not depend if they have updated visa type? At another bank it was over 2 years till my visa type was updated in the system - only updated whyen i changed address and they wanted forms filled out.