normally in EFL learning T is abbreviated with 'T'
i would assume u would abbreviate attendance as attd.
can't
I would abbreviate the word house as Ho. as in Somerset Ho.
To abbreviate recoimmendation, you would use rec.
mkt
Ter.
I would say "bth"
If I wanted to abbreviate garnishment it would be something like grnshmt. It is not exactly a common abbreviation.
I had to abbreviate the words can not into can't in my text message or I would not have anymore room to type.
bis
H2O2
Chlg