In 2022/23 I stopped working as a self employed sole trader. I thought I'd notified HMRC that I'd stopped being self employed through this online form - https://www.tax.service.gov.uk/shortforms/form/CeaseTrading
However I can't currently find any confirmation in letters/emails so am now doubting whether I did send this form. I recently sent my self assessment for 22/23 and again didn't see anything to prove or disprove.
Is there any way to check whether I have notified HMRC that I am no longer self employed?