How do I complete my first 90-day report in Bangkok, and can I use an agency for assistance?

This post discusses the process for completing a 90-day report for expats in Bangkok and mentions the option of using agencies for assistance. It clarifies that the first report must be done in-person at the immigration office, but subsequent reports can be submitted online. Comments suggest that it is often unnecessary to pay for this service, with experiences shared about mailing reports and tips for avoiding crowds at the immigration office.