Hi Victoria,
Currently, the time scale for the National Insurance Account Correction team stands at no longer than 72 weeks, however that will be 72 weeks from the date we received your correspondence. The team are currently dealing with work from 31 March 2023. Timescales can change however. If your DOB being incorrect is effecting a benefit claim or you are close to state pension age then I would advise you to contact us via the phone line or web chat so we can escalate your Date of birth change. Please find our contact details below:
Number
0300 200 3500
Text Relay
18001 0300 200 3500 (Text Relay)
Overseas
+44 191 203 7010
Open
Monday to Friday: 8am to 6pm
Closed on Saturdays, Sundays and Bank Holidays.
Web Address
National Insurance: detailed information
Webchat
Ask HMRC online - Ask HMRC - GOV.UK (tax.service.gov.uk)
Thankyou