To perform a 90 days report in Bangkok while staying in Silom, you need to visit the immigration office located at the government complex on Chaengwattana Road. Alternatively, you can use the online 90 days reporting program if you have filed in person before, or you can mail your report. Another option is to take your passport to Bumrungrad Hospital, where they can process your 90 days report for a fee of 600 baht.
90 DAY REPORTING RESOURCES / SERVICES
Use the trusted Thailand 90 Day Reporting Service to get your in-person report done and mailed to you for as low as 375 THB (even if the online system doesn't work for you).
For immediate assistance, contact Thai Visa Centre directly via LINE at @ThaiVisaCentre or Email them.