Hi June,
You may be able to change your address online.
Please see further information here -
Tell HMRC about a change to your personal details
If you are unable to do this online, you should write to HMRC at the following address:
National Insurance Contributions and Employers Office
HM Revenue & Customs
BX9 1AN
Please include the following information in your letter:
• National Insurance number
• Your name (previous names if applicable)
• Your address (and previous address)
• What your query is regarding
Thank you.