Hi Az_j,
You do need to declare your situation via turbo tax, but only the following details:
The date you entered Canada
Your earnings (gross before tax) in the period before you entered Canada (your Jan-March figure)
Here's why:
In Canada you get a tax free income allowance - roughly the first $12k per annum.
However, if you are only in Canada for a part of the tax year, you are only entitled to part of this tax free income allowance.
Say the $12k tax free allowance per annum is around $1000 per month if divided equally.
As you entered in March, you'll be entitled to 9/12ths of the allowance. Around $9k.
By giving TurboTax the date you entered Canada, it can do an accurate calculation on the above.
The amount of gross pre tax earning you had in your home country is actually irrelevant for this calculation - you could enter $1, or $100000 dollars, and your tax owed/refund will remain the same. The $ figure of your overseas earnings doesn't actually show on your printed tax return for the CRA.
Hope that helps.
