Self Assessment overpayment refund for 2023/24

Hi, I received a message request in the HMRC portal on 6 April re a 'Self Assessment Notice' to complete a Self Assessment tax return. I submitted this self assessment return online on 20 April 2024, as had all the relevant information and could see in my HMRC records that they had the same income and tax amounts. Based on HMRC's calculation, I am owed a refund. I already submitted my bank account details at the point of submission. When will I receive a repayment for this? Do I need to request a refund OR is this automatic? Thanks and kind regards.

Hi K J,
This is automatic unless you are selected for a full review.
Thank you.