Online account blocked for almost a year with no update

In November 2022 I filled out my self-assessment tax return online. I stopped just short of submitting it, thinking I might remember some vital information. I left it a few weeks, then decided to submit on Boxing Day. I went to log back in, only to find that my credentials were no longer accepted. Of course, I tried to reset my password online. The site prompted me for my email, which I entered, then sent me a confirmation code, which I entered, then finally it told me "You cannot reset your password online" and to contact HMRC for help. I raised a ticket with HMRC online support, and after submitting a few details, I got a reply saying that my case was being "investigated by a specialist team" and that while the investigation was ongoing, all online access to my account would be blocked. Months passed with no update, so I tried calling HMRC, both the online and self-assessment helpdesks. They could see there was a block on my account, but were unable to confirm why or give an update. Each of them suggested I call the other helpline instead. One of them (after asking if maybe I'd "committed fraud or something") said she would alert her superiors to the issue and I should receive an update in a few weeks, but nothing came of it. I've been calling HMRC every few months now and no one I speak to seems to be able to help. I've had to submit paper returns when I would much rather do it online. What is there left to try? Can I make a new account?

Hi Jake Humphrey,
If your Self Assessment record has been closed we would need to review your record.
You would need to contact HMRC:
Self Assessment: general enquiries

I have the same problem! I have the same problem! Suddenly I found myself with my self assessment account blocked without any reason! Even more so as the declaration I sent in April does not coincide with what I received at home! I think HMRC is out of their depth on this kind of problem! I kept contacting different agents and the only answer is to wait! I have already been waiting for about 3 months and nothing!

I tried logging in to do my self assessment a couple of days ago. I know my gateway ID and my password but it will not let me log in. Even when I try to do a password reset it just says ‘can not reset password online’. I’m going round in circles trying to speak to somebody who can sort this. All the advisers say is that someone will call me back. Has anybody managed to resolve this problem??

Hi Dannyjax79
If you cannot login or self-serve using your password, you would need to call Online Service Helpdesk on 0300 200 3600 for further assistance .
Thank you.

Having the exact same problem. Having rang about 100 times I'm just told my online account is suspended; no one can tell me why or how to sort it out. So frustrating.