Hi.
You should receive confirmation of your updated code, including whether your underpayment has been included in your code, shortly before the start of the 25/26 tax year when your new
code is issued. You should also be able to view whether your underpayment has been coded via your Personal Tax Account, and if your balancing payment is still outstanding (and not coded)
before the payment deadline of 31st of January 2025, you should receive payment reminders. If you would like us to review your record and confirm whether your underpayment has been
coded, contact us by webchat or phone via:
Self Assessment: general enquiries
Thank you.