I am right in the middle of doing last year's taxes and so far, it looks like I owe about $600-700.
PS> Yes, I know, I am ridiculously late in doing this!!!
I am positive I could have written more off, but as this is the first full year (2011) that I have been doing daycare, I was not so meticulous with keeping my receipts last year. So I don't have nearly as many write-offs as I could. Lesson learned, and I have been keeping everything I can.
If you aren't able to make a full and clear payment on what is owed, contact the government. I have found them very reasonable to deal with, as long as you communicate, offer a payment plan and stick to it. They won't turn down $50-$100 a month, and then when you are paid off, put that money away for next year.