If your summer plans include a move, be sure to change your address with the IRS. If they send a notice to your old address and you don't respond, it could be a real problem!
As with any government interaction, there is a special form for this - Form 8822. Form 8822B is also available for business moves. You can access it at IRS Form 8822.
If you are receiving Social Security or Medicare benefits, you can make a change online at www.SSA.gov.