Final answer:
The statute of limitations for Bill and Mercedes' 2007 tax return depends on when they filed the return.
Step-by-step explanation:
The statute of limitations for Bill and Mercedes' 2007 tax return depends on when they filed the return. If they filed the return on 9/6/2008 after receiving an automatic extension to file their return by 10/15/2008, then the statute of limitations would end on 10/15/2011, which is three years from the extended due date. However, if they filed the return on 3/22/2008 before the original due date of 4/15/2008, then the statute of limitations would end on 4/15/2011, which is three years from the original due date.