What if parent is qualified to claim A as dependent for 2009 and other facts above are same? 5405 instructions page 2, item 3, doesn't allow credit if you can be claimed as dependent by someone else for "homes purchased after 11/6/09" and home is purchased before this date. Did a "test" return with this info, ATX allowed the credit, didn't disallow it if changed purchase date to after 11/6/09.