Are your applying for an ITIN for your wife, or does she already have a number? You said "my spouse has an ITIN".
You can apply for an ITIN and file an income tax return at the same time by including your Form 1040 with your W-7 applications. Enter "ITIN TO BE REQUESTED" wherever your spouse’s SSN or ITIN is requested on the tax form (you’ll have to write this in on TurboTax).
Mail everything to:
Internal Revenue Service
ITIN Operation
P.O. Box 149342
Austin, TX 78714-9342
If you’re applying for a new ITIN, complete and attach Form W-7 to your tax return when you file the tax return for which the ITIN is needed. If you’re unable to file your tax return by the due date, you must file an application for an extension of time to file.
For detailed instructions refer to Instructions for Form W-7.
Canadian tax documents
You do not have to submit any Canadian tax documents to the IRS. If you are filing together with your wife, you can claim a credit for tax paid to Canada on your US return. The return will also include her Canadian income.
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