There's downtime coming for the TM47 (90 day notification) system!
23 February until 26 February the system will be unavailable.
Remember you can submit online from 14 days before your due date until your due date. Then you have an additional 7 days after your due date that you can file in person without a fine.
*Often system downtimes in Thailand extend well beyond the announced dates.
TLDR : Answer Summary
A notice has been issued regarding the downtime of the TM47 (90 day notification) system from February 23 to February 26. Users can submit their notifications online 14 days before their due date and have an additional 7 days post due date to file in person without incurring fines. Users have shared experiences of software issues and confusion regarding submission timelines, suggesting that some may misunderstand the 14-day rule for online submissions.