1
general::
Put in order; also, get ready for. For example, Once we've got the files squared away, we can decide on next year's repertory, or She had to square away the house before leaving town. This expression uses square in the sense of "arrange in accordance with some principle," indirectly alluding to the geometric square. [Early 1800s]
American Heritage Idioms
2
general::
Phrase(s): square someone away
to get someone or something arranged or properly taken care of. • See if you can square Bob away in his new office. • When you are squared away, come back and we’ll talk.
McGrawhill's American Idioms And Phrasal Verbs