2026/27 · 5-page guide
Why is my first personal tax bill larger than expected?
Self Assessment and Your First Tax Bill
Read the explanation. Then take the next step.
This is the SBX guide for personal tax. Open the PDF for the full explanation, examples, conditions and official source links.
Check the scope before applying an example.
Read the scope and relevant-year notes, then send the records requested in the guide through your private SBX channel.
Public read-only copy. No Google sign-in needed. The PDF is a dated snapshot, not a live tax ruling.
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Gather the facts first. Your account manager can confirm the treatment before you make a significant payment, claim or change.
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