I'm wanting to go to Thailand late January to see my daughter's could I book everything in December visa, flights, quarantine hotel,COE ,and then just leave my pcr test until 72 hours before I go
TLDR : Answer Summary
The consensus among commenters is that while booking flights can be done, it is advisable to wait before finalizing accommodation, visa, quarantine hotel, and other related requirements until closer to the travel date, as the situation regarding travel regulations may change.