You cannot file the 2016 tax return until next January. The only thing an ITIN is used for is filing a tax return so if she has no reason to file a 2015 return she doesn't need the ITIN.
Read the rules here : <a rel="nofollow" target="_blank" href="
https://www.irs.gov/individuals/general-itin-information">https://www.irs.gov/individuals/general-it...>
