New job paperwork

I am starting next week on an ortho floor finally. I'm from the US and moved to NS in Sept last year. I am wondering about the paperwork. In the US we have tax forms called a W-2 that we fill out and we have some determination as to how much we have taken out. I don't want to end up owing at the end of the year.

So how do I do the paperwork so I don't owe taxes and preferably have a small return?

I'm married and my husband is self employed how does that work on taxes? do I need to make any adjustments?

About how big of a chunk is taken out in income taxes? The US is different in that we have a lot of little chunks that add up to about 40-50% of your check if your single. I'm making over 30% more than what I made in the US.

I'm really excited about the job ..... I've not had this much enthusiasm over nursing in a long time. I think the break really helped. I just hope I passed CRNE's I felt pretty good about the exam when I left.