Self Assessment tax penalty but paid tax based on simple assessment tax calculation

Hello - this last tax year I completed a self assessment tax return by mistake when I didn't need to and have now received a tax penalty charge which is to be paid by 18 April. I paid all the tax owing according to my simple tax assessment calculation on 31 January. My 'Check how much tax you paid' webpage, for tax year 6 Apr 22 to 5 Apr 23 states 'You do not owe any more tax. You have no more payments to make to HMRC.'. All my income is PAYE and is covered in my 'simple assessment tax calculation' - I did not need to complete a self assessment tax return. How can I fix this situation and get the penalty charge cancelled? Thanks.

Hi ML000165,
You will need to contact HMRC to review this for you:
Self Assessment: general enquiries
Thank you. 
 

I have this exact same problem for the year 2022_2023, although my duplication was triggered by the fact HMRC originally thought I needed to complete a Self Assessment, but we then agreed I no longer needed to as had stopped being self-employed etc. I have written to HMRC twice and tried phoning to sort it out, but with no luck getting through again, including today. I call of 1hr 6 mins to get to the wrong dept and two cut-off calls. Still on hold now... Please, admin, any other contact method suggestions?

Pls can u help me with my tax return

Hi  baerskimmason

I'm sorry to hear that you've had issues contacting us. In addition to phoning us, you can contact us by webchat - just click 'Ask HMRC Online' at Income Tax: general enquiries

Thank you

Hi Tom14

Of course! For any advice on completing your return, contact us by webchat or post via Self Assessment: general enquiries- depending on the circumstances, we may also be able to offer addittional assistance to help you complete your return, too.

Thank you