Reporting overseas income and when to pay tax

I returned from living in the US earlier this year, and had no tax liability to the UK for the tax year 2023-2024. I am now a UK resident, and will owe UK taxes for the 2024-2025 tax year. I have retired, and my income consists entirely of interest and dividends (no pension yet), almost all of which is from US based investments. This income will exceed the personal allowance and the savings and dividends allowance. As no UK tax is withheld at source, do I have to make any tax payments before I prepare my 2024-2025 tax return in 2025 or 2026? Is there any income or predicted amount of tax due where I would have to pay taxes early or inform HMRC of my income? If so, how and when do I need to do this? Or can I just leave doing anything until the end of the 2024-2025 tax year? Thank you.

Hi,
Please refer to:
Tax on foreign income
Thank you.