Can the DTV visa be cancelled in Thailand?

Great question. There are a lot of unspoken disadvantages to the DTV including tax reporting (unconfirmed) but also time frames, jobs, etc.

You could change visas. Find a Thai language school and ask for an ed visa. You will pay again but it will null your DTV. Great question. Your options are limited because technically you have a retroactive tourist visa with higher stipulations.

What if you have to show income proof and have a bad month or two?

Yeah. Again good thinking ahead.

Simply exiting the country will cancel your current permit to stay, no need to cancel the visa, just get a new Non B from a nearby country and ask the embassy to stamp your DTV as used, they will not reject your Non B application. When re-entering make sure you show the IO your Non B, if the embassy hasn’t already stamped the DTV as used the IO will.

If I was you I would contact a "Connected" Visa Agent. If they do not have answers at hand they should be able to call an Immigration Office and find out the process - good luck

Interesting question. I was on an "O" Retirement when I was offered a role, so I needed the "O" cancelled so I could fly to Singapore and apply for the "B" visa. We were told they would not process the "B" at the embassy while the "O" was live. I was advised to fly to Singapore and come back, but ask Immigration at BKK to let me in on Visa Exempt, thus cancelling the "O". Well, I had a multi-re-entry permit, so they would not let me in visa exempt.. I spent about 30 minutes at a desk with them trying to help me. In the end, they told me I had to have it cancelled at the issuing office due to the multi-entry. Long story short - I had to pay a "Facilitation" fee to have the visa cancelled and have 7 days to leave Thailand. Did a Cambodian border bounce and came back with a Visa Exempt. Flew to Singapore and got my "B" for 90 days. Back to Thailand, a WP and B issued for 2 years. I hope you have it easier with DTV - it did get me 2 times 5 nights in a 5* in Singapore though on expenses :-)

I believe it gets cancelled if you were to secure another visa.

it seems that someone would want to "cancel" (more likely convert) an active DTV Visa to another Thai Visa: could be Non–B in order to work in Thailand (perhaps received a new job offer), Non–O after getting married to a Thai Spouse, or any other Thai Visa....

A Thai Embassy/Consulate usually does not cancel an active Thai Visa and any active Thai Visa cancelled by a Thai Embassy/Consulate would definitely need approval from the Ministry before being able to do so. Now, with all Thai Visa's nowadays from Thai Embassies/Consulates being Thai E–Visa, it is very difficult to do, as those who have genuine errors made by the Thai Embassy/Consulate, the Thai Embassy/Consulate cannot edit in the Thai E–Visa System and re-print, but only by printing out a Thai E–Visa and manually changing their error by hand/ink and making a notation is usually the current practice for Thai E–Visa errors made by a Thai Embassy/Consulate

Now, in the regulations, a DTV Visa can be converted in-country to another Thai Visa, but so far, there have been no field reports thus far of someone successfully converting their DTV to another Thai Visa

But, if you want to cancel an active DTV Visa, then contact the Thai Embassy/Consulate that issued the DTV Visa and see what they say. There is no point in contacting your local Thai Immigration Office about cancelling an active DTV Visa issued by a Thai Embassy/Consulate.

Why would you want to cancel it?

New govt could easily end the whole program

why would you want to cancel it?

Visas generally can't be cancelled, you either use them or not. As the DTV is based on tourism it is possible to change it to another type of visa inside Thailand at an immigration office, just as you can for a normal tourist visa or visa exempt entry.

What is the sense to cancel?

I guess it will cancel automatically if you apply for a new Visa, for example Non-B

I asked the immigration and they said you have to go to the country you applied, and cancel there

Just don't use it or extend the 180 days