Incorrect birth date in the HMRC system.

Hello, for a few months, I found out that my birth date is incorrect in the HMRC system. I discovered this because I tried to log in for the first time on the HMRC website, and it didn't work. I sent my passport and all the details to correct the birth date around the end of October. I waited until now, and yesterday I called HMRC to find out if the change has been made or not. They said it takes approximately until March 7th. Now my question is: Is there any method to find out the incorrect date on my HMRC details? Because I urgently need to obtain some proof from there, and it's a very long period until March.

Hi,

Unfortunately, for the protection of your record and your own data security, we are unable to confirm any specific incorrect information on your record. If your record has not been updated by March 7th, at the latest, please contact us again.

Thank you.