What should I do if my 90-day Visa reporting was unapproved due to an address mismatch?

Yup, your TM30 is probably not correct. Try doing it online and then do the TM47 online. If it doesn't work, you'll have to go into the office.

my current 30 day ends on the 25th of January. I entered Bangkok on the 19th…. then traveled to Singapore till the 27th. My visa application was rejected( checked wrong box) I returned to Thailand and now have till the 25th! Will I be able to do a “ border run” from Hua Hin to Cambodia and get an additional 30 day visa?

yes, phuket is one of those rouge immigrations that require you to file a NEW tm 30 whenever u check into a hotel or leave the country, even if ur at the same address>

if ujr NOT in phuket and wont be ( before the 7 days after date allowed) just forget it until u need use immigration as ur going to be hit with a 2,000 baht ( 1,000 no receipt) fine for no 90 day report

Easy site to use

It appears that this issue is different around the many io offices in Thailand. Until recently I did not have to file tm30 after staying away in a hotel or other place where a tm30 was filed for me. Recently I got a good telling off when doing 90 day report because I had stayed in Udon for a few nights. The situation had changed. I was not fined and had all the papers with me for tm30 so got both done together but was warned not to do it again. I now do both tm30 and tm47 on line when required which makes things a lot easier. You have to have a co operative landlord to do this as the property has to be registered and to do that you need to upload copies of their details and house books. Then it is a simple matter of uploading your passport every time you return after a trip. I use tm30.io and the official tm47 site both of which are easy to use.

Whenever you travel to another province and return to your "home address" you need to update your TM30 details, otherwise your address will show as the last hotel you stayed at

Like you said, it sounds like a mismatch between your most recent TM30 address and the address your filed for your TM47.

You can try getting a new TM30 filed by the owner or landlord for where you're staying and file the TM47 again if you have enough time. You can only submit the 90 day report online up until your due date. If that's already passed then you have until 7 days after your due date to file in person. Please note all immigration offices are closed until January 2nd.