HMRC Admin 21 Response

Hi Fozboy,
If the underpayment is for the last tax year 2022/23 then if shown on your Personal Tax Account there would be the option to pay. 
Thank you.

Hi Beverley
You can check if you need to submit a Self Assessment tax return at:
Check if you need to send a Self Assessment tax return.
If you do meet the criteria then you ca nregister online at:
Self Assessment tax returns.
Once registered you will receive a Unique Tax Reference, UTR. Once you have this you can then enrol to file your Self Assessment online. If you need help to you can contact our Onine helpdesk at:
Technical support with HMRC online services
Thank you.

Hi Stringy
In section 3, tailor your return, you would select yes to self employment and provide a name for your self employment.  Save and continue.  Click on section 4 - fill in your return and select self employment from the list.  Select 'No' to was your turnover more than £85000.  Scrool down to the questions regarding the turn over of £1000 or less and Save and continue.
Thank you.

Hi angelac
No,  There is no need to declare a tax refund to HMRC.
Thank you.

Hi akquestion
If you do not complete a Self Assessment then the bank/building societies report the interest details to HMRC after the tax year end. Once received HMRC will review your PAYE record and if tax is due a calculation will be issued to you.
Thank you.