What do I need to do for a 90-day report and extension after moving to Roi Et on a Non-O retirement visa?

When you moved you go to your new immigration office and filed a new TM30 (notification of foreigner in residence) form, and/or a TM28 (change of address) form if that office still uses that form..

Then once you're registered as staying at an address served by the immigration office you can do 90 day reporting there and you can do your next yearly extension there as well.

When you go to file the TM30 or do your next 90 day report ask them for the hand out listing the requirements to get an extension based on retirement at that office.