Did you already file your tax return? If you have not filed yet, then go to My Info to enter the correct mailing address for the IRS to use if they need to mail you a letter or a check. If you already filed and have a new address, you need to send a change of address to the IRS.
CHANGE OF ADDRESS
https://www.irs.gov/faqs/irs-procedures/address-changes/address-changes
And make sure you have filed the forms with the U.S. Post Office to have mail forwarded to your new address.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**