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Step-by-step Guide

HMRC Filing Exclusions and Special Cases 2021/22

Article ID: 3236
Last updated: 20 Apr, 2023

HMRC Filing Exclusions 2021/22

Exclusions have arisen due to the previous introduction of additional allowances and bands for certain types of income, making the calculation of the tax liability more complex. HMRC systems expect our software to match their method of calculation in order for the returns to be filed electronically. However, the legislation states that HMRC should deduct the reliefs and allowances in the way which will result in the greatest reduction in the taxpayer's liability to income tax and this is not always the case in their methodology.

Whilst some of last years' issues have been corrected by HMRC, some remain and some have also been added. Consequently, our software may not provide the correct calculation and for most scenarios affected, before filing, TaxCalc will identify the exclusion number and provide instructions on how to deal with the return.

HMRC Exclusion List 2021/22

HMRC Special Cases 2021/22

Special Cases represent issues that HMRC have identified as requiring a workaround in order to prevent a filing rejection. Where possible, we have taken care of these workarounds within the software or have provided a message before live filing to advise how to deal with the workaround. There are limited scenarios where a paper return will need to be filed. Some examples of special cases are:

  • Where additional documents must be sent with the return and the file size exceeds 5mb.
  • If you attempt to submit more iterative boxes than allowed.
  • Where the return contains Multiple Chargeable Event Gains.
  • If you have an Individual return with more than one accounting period.

Before filing, TaxCalc will identify the Special Case number and provide instructions on how to deal with the workaround.

HMRC Special Cases List 2021/22

Should paper filing be required, to print your tax return with a Reasonable Excuse form attached:

  1. Within SA100 go to Check and Finish and select Print.
  2. Within Printing Preferences, select HMRC (official return pages to file by post) within Who is it for? This will ensure that the reasonable excuse form is ticked.
  3. At the bottom of the screen you will see a 'Click here' to enable the entries to be made on the Reasonable excuse form.
  4. Click Close once completed.
  5. Preview to check pages.
  6. Hover the mouse over the return to see the Print options.

Exclusions not identified within TaxCalc

There are some exclusions which we have not included within the software. This is due to either outstanding queries with HMRC on the specific criteria to capture the relevant scenarios or the circumstances in which the issue arises is considered to be rare. A paper return, along with a reasonable excuse form should be filed for returns affected by the following scenarios:

HMRC Reference

Key factors



  • Non-UK residents
  • Partnership loan written off

Non-UK residents who belong to a partnership, which has written off or released an amount from a company loan (treated as income), may be affected. If the individual also receives a dividend which has an associated notional tax credit, it is currently being offset against the write-off income incorrectly.


  • Two self- employment pages with losses exceeding £50k cap
  • Overlap relief claimed on one

In this scenario, the overlap relief is subtracted from the total combined loss across the two schedules in order to identify the amount of loss subject to the £50,000 cap. This will then increase the amount not subject to the cap thus allowing too much relief.


  • Dual or non-UK residents claiming partial relief from UK tax
  • Property finance cost relief

When partial relief from UK tax is being claimed on either savings and/or dividends and relief for residential finance costs is also being claimed, the finance costs relief may be too high. This is due to the savings and dividend income being included as non-savings income within the calculation of adjusted net income.


  • Dividends remitted to the UK in 2021/22

  • Dividends qualifying for 10% tax credit

  • Personal allowance utilised against some of the dividends

 The 10% tax credit available against the   dividends should be restricted to 10% of the   amount of dividend after the deduction of the   personal allowance. Currently the tax credit is   not restricted by deductions.


  • Pre-incorporation losses being claimed

  • Total loss relief claimed exceeds £50,000

The pre-incorporation losses will be included  in amounts to be restricted by the £50,000  whereas they should be excluded from the cap. As well as restricted relief, this will impact the calculation of net adjusted income so could affect other allowances.


  • Chargeable event gains

  • Total income within the higher rate band but additional rate tax being charged on some income

Additional rate tax will be charged if the total taxable income is within £500 of being within the additional rate band. This is due to the amount of higher rate band available being reduced by £500 due to an incorrect calculation involving the personal savings allowance.

  • Life insurance gains on policies held for more than one year

  • Top Slicing relief (TSR) due

  • The personal savings allowance and starting rate for savings allowance are different when the gain is annualised

HMRC have reviewed the TSR calculation and accept that the personal savings allowance and starting rate for savings amount should be recalculated in the TSR computation, based on the annualised gain. The current calculation does not allow for this, despite allowing for a change to the personal allowance.


  • Non-UK residents

  • Income limit reached for High Income Child Benefit Charge (HICBC)

The HICBC is currently being included within the non-UK resident tax liability. The non-UK resident tax liability should only include income tax that would otherwise be charged on disregarded income.


  • Income falls within the higher rate

  • Non-savings income is less than the personal allowance and starting rate for savings

  • Savings and dividend income present with 

The personal allowance is not allocated in the most beneficial way. It will be allocated wholly to the non-savings income when it would be more beneficial to allocate some to the dividends (the excess over the dividend nil rate).

Looking for exclusion and specials links to earlier years?

HMRC Filing Exclusions and Special Cases 2019/20

HMRC Filing Exclusions and Special Cases 2020/21

Article ID: 3236
Last updated: 20 Apr, 2023
Revision: 17
Views: 1302
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Also read
item HMRC Filing Exclusions and Special Cases 2019/20
item HMRC Filing Exclusions and Special Cases 2020/21

Also listed in
folder Tax Return Production -> SA100 Individual Return