ISA cash & ISA share account Exceeded limit 24/25

In November 2024, I opened an ISA share account with Company A and invested £20,000. Unfortunately, I forgot that in May 2024, I had already opened an ISA cash account with Bank B and made a £20,000 one-year fixed deposit. This exceeds the ISA allowance. What should I do in this situation? Would canceling one of the ISA accounts resolve the issue? Thank you.

Hi
If you have oversubscribed in the current tax year, you can contact your ISA provider to instruct them to remove overpayment amounts to correct the error. If the error occurred in a previous tax year you should not do anything. You should not attempt to correct the situation. HMRC will write to you after the end of the tax year in question if appropriate.