Get help with Self Assessment filing if you're a sub postmaster
If you received Horizon Shortfall Scheme (HSS) compensation between 6 April 2022 and 5 April 2023, you can get support about your Self Assessment tax return.
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Postmasters in the Horizon Shortfall Scheme (HSS) who do not receive their top-up payment in good time to file their Self-Assessment tax return before 31 January 2024 will not have to pay any late filing or late payment penalty or interest. A dedicated team stand ready to provide Postmasters with any support required.support required.
Contact our dedicated support team
Telephone:
0300 322 9625
Our phone line opens 10 January 2024. Opening hours are:
Monday to Friday: 8am to 6pm
Last updated 11 January 2024 + show all updates
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A Welsh translation has been added.
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First published.
Update history
2026-01-29 16:10
Guidance for postmasters in the Horizon Shortfall Scheme (HSS) has been updated to include the dates 6 April 2022 to 5 April 2025.
2025-07-17 11:36
Updated with information on sending a tax return for tax year 6 April 2022 to 5 April 2023, and 6 April 2023 to 5 April 2024 for postmasters in the Horizon Shortfall Scheme.
2024-02-13 16:03
Information about National Insurance credits has been added to the getting help section.
2024-01-29 15:33
A new section has been added regarding the use of Horizon data and Self Assessments.
2024-01-25 16:38
Last update published in error. We will publish another update shortly.
2024-01-25 15:00
A new section has been added regarding the use of Horizon data and Self Assessments.
2024-01-11 16:15
A Welsh translation has been added.
2024-01-08 18:30
First published.