I got few questions. So today my dtv got approved in Hanoi. And I already had return ticket on 30th October .

1. can I reschedule and change return ticket to earlier date? It says my visa valid from 24 October but I did tell them that my flight return ticket is on 30th October

2. what is the process for dtv holder when I enter immigration ? What do I need to do or bring

3. what is the rules once I am in the country as dtv holder? Can someone explain the 90 days report and 180 days . Like what would you recommend me to do

i recently just got my dtv accepted and on the visa it has my initial flight info. if i need to reschedule my flight do i need to fill out any forms or paperwork to update the flight info?

Applied for my short term visa from Los Angeles Embassy. Turn around 2 days.

Some website said I should allow for 15 business days.

I booked everything 4 weeks from now.

I do not have Thai Pass, website said wait 2 weeks before travel.

Should I pay to reschedule flights, hotels, etc and try to catch a plane 1 or 2 weeks from now?

Pros?

Cons?