Special Cases and Exclusions

As part of filing online, your clients’ returns are validated against HMRC’s own online filing specification. There are some instances where the HMRC server will incorrectly report a data validation error against a submitted return.

To limit the number of returns that get falsely rejected, HMRC prepare a list of Special Cases and Exclusions and make this list available to software developers like Sage. We then take this information and incorporate a series of checks in the software.

For further information about each Special Case or Exclusion, please follow the link for the relevant tax year.

2015-16 Special cases for 2015-16
Exclusions for 2015-16
2016-17 Special cases for 2016-17
Exclusions for 2016-17
2017-18 Special cases for 2017-18
Exclusions for 2017-18
2018-19 Special cases for 2018-19
Exclusions for 2018-19

Before you can file online, Sage’s Personal Tax software checks your clients’ returns meet HMRC’s online filing requirements. In most cases these validations will identify whether your client’s return is covered by a Special Case or Exclusion.

There are, however, some Special Cases and Exclusions which our software does not currently detect. For the 2018-19 tax year, these are:

Affected areas Cases
Adjustments to earlier years Special Case 10. Exclusion 12
Averaging adjustments Exclusion 34
Class 4 NIC Exclusion 109
Double Taxation Relief Special Case 9
General Exclusion 15
Lump sums Exclusions 85, 112
Other UK Income Special Case 13
Reliefs and Allowances Exclusion 100
Remittance basis Exclusion 110
Repayments Special Case 20
Residency Special Cases 11, 30, 31. Exclusions 19, 47
Scottish taxpayers Exclusion 112
Self-employments Special Case 36
Share Fishermen Exclusion 46
Trust income Special Case 22. Exclusions 5, 20, 62, 112

How can I tell if a client is affected?

In certain circumstances, if HMRC identifies scenarios where the tax calculation is incorrect, it issues exclusion cases and advises taxpayers to submit a paper return.

HMRC is still reviewing the definitive criteria to identify the incorrect calculations and we are working with them on this.

Where possible, the software identifies returns that are affected by these exclusions and offers the appropriate advice.

If you need clarification on a particular client, please contact HMRC on 0300 200 3311 for further advice.

How do I submit a paper return?

  • 1. Navigate to Report Preview.
  • 2. Select Tax Return PDF.
  • 3. Generate a PDF without a draftmark.
  • 4. Post the tax return and associated reasonable excuse claim to the appropriate HMRC address for your client.

It is not currently possible to use the software to override the SA110 Tax calculation summary pages, therefore if you wish to alter the calculated tax figure this must be done manually.

For further information from HMRC regarding the tax calculation errors that they have identified, see HMRC Tax Calculation Errors Update.

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