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.
This maybe something that can be some use to you, ive booked one of these tickets just in case i was asked at the airport ( I wasn't asked but had it in case i was) Its called onward ticket, you get a ticket for a flight from Thailand to somewhere of your choise, but its not a real ticket and you'll not be able to board the flight. but you do get a ticket and if you check the airlines web site it will come up as a real bought ticket. do a bit of a seach about it and see it its of some use.