Ma'am,
1. There's no 'attachments' to be enclosed with the CTB application.
2. We r required to 'state only' our previous 2yrs' income...
3. This would be 'global income', gross, for the 'family' [everyone's income is to be included].
4. We can't comment [in writing] on what level of income u should declare [pls take the hint].
5. CRA is not going to look for any 'pay slips', bank statement or anything. It's all in good faith.
6. If u had 'landed' in 2010, even in Dec, u guys r required to file-in your Tax Returns, by 30th Apr 2011 [we all have done it already].
7. If there were no income in Canada, u won't pay anything... rather CRA will 'pay u back' something* !
8. Do not file the Tax Returns yourself -- take a CGA's help [it costs $25 here].
Hope that helped...
Qorax
*That's the beauty of Canada !!!