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2. Current position on tax returns
HMRC’s policy on amending tax returns
2.1 An amendment is any change made by a taxpayer to a submitted return. It
forms an important part of HMRC’s tax administration framework and ensures
that both HMRC and its customers can exercise their right to correct, adjust or
amend a filed return. The process in making an amendment varies according to
tax type and in this chapter we will set out the existing processes for ITSA,
CTSA and VAT.
2.2 Where a taxpayer wants to make a change to a tax return, in some instances it
is possible to file an amended return. The period in which amendments to
returns can be made depends on the tax type.
2.3 HMRC can undertake a compliance check to check for errors in a tax return.
For example, under ITSA, HMRC can correct or amend any obvious errors or
mistakes made by the taxpayer by amending their tax return within 9 months of
the date the return was delivered. This is not the case for all tax types.
2.4 HMRC recognise that the current processes for making amendments are not
consistent across the taxes. For example, taxpayers can currently amend ITSA
returns online, manually, and make some amendments by phone. They are not
restricted to amending in the same format that the return was originally made
(e.g. a person filing online can still amend on paper or by phone). Whereas
depending on the circumstances, amendments to VAT returns may be made on
subsequent returns or may have to be notified separately on paper.
Amending ITSA returns
2.5 Taxpayer amendments to ITSA returns should usually be made within 12
months of the statutory filing date. The ability and period in which to amend a
tax return is therefore linked to the filing date for the particular return.
For example, if a taxpayer has filed a 2016-2017 return online (with a filing date
of 31 January 2018) they would be able to amend that return up to 12 months
after the filing date, so until 31 January 2019.
2.6 Where the taxpayer has informed HMRC of their chargeability on or before 5
October, following the end of year of assessment, but the tax return is not
issued until after 31 October, the taxpayer has three months from the date of
issue to file the tax return. The return can be amended up to 12 months after
the deadline for filing.
2.7 ITSA returns that have been filed online can be amended online or by paper.
The normal deadline for filing an ITSA tax return online is 31 January after the
end of the tax year. For example, an ITSA return for 2016-17 should generally
have been filed by 31 January 2018. Paper returns must be filed by 31 October