Christmas in Thailand is not a holiday unless you have children and now my children think it's a given they get presents now for Christmas,.when one of my children ask what is the best time Christmas, birthday, new year or Songkran 1 said birthday the other said Christmas and the wife said Songkran.
if you go on there website there is somewhere a link to get a free 15 min web chat mobile call, I sent them as much info as I had so they could have most of the answers ready for me,
when I had a 15 min free call with them he outlined the tax credits I would get like health insurance that's a tax credit and other things you can get tax credit for like being married and got kids they are some of the tax credits
I always have 3 or 4 sites open when I am looking for flights, Trip.com Skyscanner. Momondo. Kayak these I used the most but you have to be aware now a lot of flights now offer flights with just hand luggage and people have fallen for thinking that cheaper than others then later find out they have to pay extra for their luggage.