Do I need to complete Self Assessment - Conflicting information from phone support

On an initial call to phone support I asked a question about foreign dividend income which the handler said was ‘technical’ and I would receive a call back. As this this will be the first year I exceed the allowance I asked about reporting and it was confirmed I only need to report by phone which is what the website says (from past performance not anticipating anywhere near the £10k limit). When I received the call back, in addition to answering my question I was told I will need to start completing Self Asesssment from tax year 2024-2025 and that my old Self Assessment account would be reactivated. Would appreciate confirmation of which is correct.

Hi jar04,
Please use the online checker here:
Self Assessment tax returns
Thank you.