Hello it's been 3 weeks since I filed my return. I am wondering if everything is fine as I didn't receive my refund yet Thanks

If you efiled, you can double-check with this tool to be sure the return was efiled successfully and accepted.
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp

If that showed it was accepted, you can check the status of the Federal refund with this IRS tool:
http://www.irs.gov/Refunds

If that shows it's been processing longer than 21 days, you can phone the IRS to see if you can learn anything about the delay.

IRS:  800-829-1040  hours 7 AM - 7 PM local time Mon-Fri

Listen to each menu before making the selection.
 
First choose your language. Press 1 for English.

• Then do not choose the first choice re: "Refund", or it will send you to an automated phone line.
• Instead, press 2 for "personal income tax".
• Then press 1 for "form, tax history, or payment".  
• Then press 3 "for all other questions."
• Then press 2 "for all other questions."  It should then transfer you to an agent, but there is likely to be a long wait.

I usually use a speakerphone so I can work on something else while waiting.

I am actually from Canada. How can I check a Canadian file status

What kind of return are you referring to?    A USA return or a Canada tax return?

It's Canada tax return

You're in the wrong forum.  This is the USA community forum.  I admit they look alike, and we have complained to TurboTax to make them look different.

Here is the Canada TurboTax AnswerXchange community forum if you need assistance:
<a rel="nofollow" target="_blank" href="https://turbotax.community.intuit.ca/tax-help">https://turbotax.community.intuit.ca/tax-help</a>

And the Canada TurboTax main site:
<a rel="nofollow" target="_blank" href="http://turbotax.intuit.ca/tax-software/index.jsp">http://turbotax.intuit.ca/tax-software/index.jsp</a>

Thanks

You're welcome.  Good luck.