Hi Neil,
You have until Feb. 28, 2014, to report her attestation. I assume this is a continuation of your other thread and that this is for MU stage 1. So she had to start by 10-3-2013 to get in 90 days during 2013, and you get 2 months in 2014 to report the attestation.
I could not find a reference for that in cms.gov, but found this reference, look in the meaningful use deadlines paragraph.
http://www.drfirst.com/education/meaningful-use-deadlines.jsp