How do I complete the first 90 days report for a retirement visa, and can I do it online?

To complete the first 90-day report for a retirement visa in Thailand, it must be done physically at the immigration office. However, once the first report is submitted, subsequent reports can be done online or by mail. If you're in Bangkok, you can mail your 90-day report 15 days before the due date without going to immigration directly. You will need to include a copy of the TM30 and your passport for the reports.