I would recommend contacting the IRS right away to ensure that your refund check is delivered to the appropriate address. Here's how to contact the IRS:

Call the IRS:  1-800-829-1040  hours 7 AM - 7 PM local time Monday-Friday

When calling the IRS do NOT choose the first option re: "Refund", or it will send you to an automated phone line.  

So after first choosing your language, then do NOT choose Option 1 (refund info).  Choose option 2 for "personal income tax" instead.

Then press 1 for "form, tax history, or payment".  

Then press 4 "for all other questions."

Then press 2 "for all other questions."  It should then transfer you to an agent.