Do I need to fill the SIN field? Both myself and my spouse are not Canadian residence, we don't have a SIN yet. How do we fill the SIN as it is a mandatory field?

[vsnoopy]

I've already use 000000000 in my SIN field, when I try others, like xxxxxxxxx in my spouse's SIN, I can't pass!

[TurboTaxSusan]

You can’t file a tax return in Canada without a Social Insurance Number or an Individual Tax Number (ITN). If you don’t have either, you will need to contact the CRA to get one. If you are in Canada or the United States, you can call 1-800-959-8281. If you are somewhere else you can call 613-940-8495. Here are more ways to contact the CRA: https://www.canada.ca/en/revenue-agency/corporate/contact-information/telephone-numbers.html