Resubmit the untaxed foreign income for previous year

I just alerted the small amount of untaxed foreign income even though it is less than the personal allowance, I should submit it via self assessment. Could you please advise the procedure for resubmit untaxed foreign for previous year. Thanks

Hi,

If you have already submitted a tax return online, you can just amend it. If not, you will need to write in with the details to HMRC PAYE & Self Assessment BX9 1AS.

Thank you.