You will need to apply for Individual Tax Identification Numbers (ITINs) for your wife and child by submitting Form W-7, and that process has undergone some radical procedural changes this past year. Instead of the simple notarization process, the IRS now requires that your home country certify the photocopy of your passport as a true copy. This is due to rampant fraud in the ITIN submission process. The notaries simply cannot tell the difference between a fake passport and the genuine passport.
The IRS recently announced the opening of Tax Assistance Centers through which you may be able to have the passport verifued as genuine, then submit the tax return and Form W-7 IN PERSON to be forwarded to the ITIN Processing Center in Austin, Texas for processing , without having to get the photocopies certified by your home country consulate. The list of the TACs are at the link below:
Taxpayer Assistance Center Locations Where In-Person Document Verification is Provided
The alternative is to mail in the actual passports themselves, something most of my clients are reluctant to do.
If you believe that you will need professional help filing this year, this IS what I do. Please double-click on my name (Atlanta Tax Expert) above to access my profile. You will find my email address in the signature portion of the profile (scroll down to the BOTTOM of the page).