Thanks, further questions:
1: How does one find out what their current annual interest is across all products?
2: Does it always run April to April regardless of when an account was opened? i.e. Say you open an account in December 2023, only the interest earnings on that account from December 2023 through to the following April 2024 are included in that years interest earnings?
Your savings account provider(s) will issue you a Certificate of Interest at the end of the tax year stating how much interest you received. Or you could just go through your statements and tot up the interest payments.