Tax bill following self assessment

I submitted a self-assessment by the 31/1/24 deadline for the 2022/23 tax year. My calculation was that I underpaid tax but I've not received formal confirmation from HMRC or a tax bill. It's now the end of May and my Tax Year overview on the my account the values are all £0. Is this normal to still be waiting 4 months?

Hi,

If it is not shown on your account, you will need to contact our Self Assessment team to review.

Self Assessment: general enquiries

Thank you.