Guide to Stamp Duty Land Tax Forms and Letters for Transactions

HMRC SDLT processing forms and standard letters

HMRC uses a set of standard SDLT forms and letters to process land transaction returns, request missing details and confirm when a transaction has been properly notified. The most important document for conveyancing is the SDLT5 certificate, because it confirms notification and allows the Land Registry to proceed with registration.

• SDLT1 is the main land transaction return and is described by HMRC as required for all transactions.
• SDLT2, SDLT3 and SDLT4 are extra forms used where more details are needed about the parties, the land, or the transaction or lease.
• SDLT5 is the certificate showing the transaction has been notified, which is usually needed before registration can move forward.
• HMRC may send SDLT8 or SDLT8A if it needs further information, and SDLT12 or SDLT12A if it says more tax, penalty or interest is due.
• If matters are not resolved, HMRC may issue SDLT14 saying no further reminders will be sent and no certificate will be issued.
• The guidance is mainly about processing status rather than the underlying SDLT liability, and it does not fully explain the effect of every letter or form.

Scroll down for the full analysis.

SDLT processing forms and letters: what HMRC’s standard documents mean

This page explains the main forms and standard letters referred to in HMRC’s SDLT processing manual. The source material is brief and administrative, but it matters because these documents are part of how a land transaction is notified, checked and progressed to registration. Understanding what each form or letter is for helps you see where a transaction is in the SDLT process and what may happen next.

What this rule is about

The source material is not setting out a tax charge or relief. It is describing the standard forms and letters used in the administration of Stamp Duty Land Tax.

In practical terms, these documents do three main jobs:

• they collect the information HMRC needs about a land transaction;
• they allow extra information to be provided where the basic return is not enough; and
• they support HMRC’s follow-up process where information, tax, penalties or interest are still outstanding.

One document is especially important for conveyancing: the SDLT5 certificate. The manual says this confirms that the transaction has been notified and that the Land Registry may proceed with registration.

What the official source says

The HMRC manual page lists the forms and letters most frequently used in the SDLT processing series. It identifies their function as follows.

• SDLT1: the land transaction return notification form required for all transactions.
• SDLT2: additional vendor or purchaser details.
• SDLT3: additional details about the land.
• SDLT4: additional transaction or lease details.
• SDLT5: certificate confirming that the transaction has been notified and that the Land Registry may proceed with registration.
• SDLT8 and SDLT8A: standard letter requesting further information, and a reminder.
• SDLT12 and SDLT12A: standard letter stating that further tax, penalty or interest is due, and a reminder.
• SDLT13: a standard letter, but the content is withheld under the Freedom of Information Act 2000.
• SDLT14: a standard letter informing the purchaser that no further reminders will be sent and no certificate will be issued.

The page also refers to guidance notes for SDLT1 and SDLT4.

What this means in practice

The practical message is that SDLT administration is built around a core return and a set of supporting forms.

The SDLT1 is the main return. The manual describes it as the notification form required for all transactions. Where the transaction is more complex, extra forms may be needed to give HMRC enough detail. For example, if there are more parties than can be fitted onto the main return, SDLT2 may be used. If further property details or lease or transaction details are needed, SDLT3 or SDLT4 may be relevant.

The SDLT5 certificate is significant because it is the document that confirms notification and allows registration to proceed. That means a problem with the return, or with HMRC’s processing of it, can affect the next stage of the conveyancing process.

The standard letters show how HMRC deals with incomplete or unresolved matters:

• If HMRC needs more information, it may issue an SDLT8 and then a reminder SDLT8A.
• If HMRC considers that more tax, penalty or interest is due, it may issue an SDLT12 and then a reminder SDLT12A.
• If matters are not resolved, the manual indicates that HMRC may send SDLT14, stating that no further reminders will be sent and no certificate will be issued.

That last point matters because if no certificate is issued, registration may not be able to move forward in the usual way.

How to analyse it

If you are trying to understand where an SDLT matter stands, the useful questions are administrative rather than interpretive.

• Has the main return been made on SDLT1?
• Was any extra form needed because the transaction involved additional parties, extra land details, or lease or transaction details?
• Has HMRC issued an SDLT5 certificate yet?
• If not, has HMRC asked for further information by standard letter?
• Has HMRC said that further tax, penalty or interest is due?
• Has the matter reached the stage where HMRC says no further reminders will be sent and no certificate will be issued?

This framework helps separate two different issues:

• substantive SDLT liability, meaning whether the right amount of tax has been reported and paid; and
• processing status, meaning whether HMRC has enough information to complete the administrative steps and issue the certificate.

The source material is mainly about the second issue.

Example

Illustration: a buyer submits an SDLT1 for a property transaction. The transaction has features that require additional lease or transaction detail, so SDLT4 is also needed. If HMRC considers that something is missing or unclear, it may issue an SDLT8 asking for further information. If the issue is not dealt with, a reminder may follow. Until HMRC is satisfied that the transaction has been properly notified, the SDLT5 certificate may not be issued. That can delay the point at which the Land Registry may proceed with registration.

Why this can be difficult in practice

The source page is very short and assumes familiarity with the SDLT system. It does not explain:

• when an additional form is mandatory rather than optional;
• what triggers a particular standard letter in detail;
• what procedural rights or next steps follow from each letter; or
• how these administrative steps interact with the substantive legal rules on filing, payment, amendment, penalties or appeals.

So while the page is useful as a map of HMRC’s standard documents, it is not a complete statement of the law or procedure. In practice, the effect of any letter depends on the underlying filing position, the transaction details, and any wider statutory rules that apply to notification, payment and registration.

There is also one obvious gap: SDLT13 is listed, but its contents are withheld. That means the manual page itself does not allow a reader to understand that letter’s role.

Key takeaways

• SDLT1 is the core land transaction return, and the manual describes it as required for all transactions.
• SDLT2, SDLT3 and SDLT4 are supporting forms used where extra party, land, lease or transaction details are needed.
• SDLT5 is the key certificate confirming notification and allowing the Land Registry to proceed with registration.
• HMRC uses standard letters to ask for more information or to state that further tax, penalties or interest are due.
• If issues are not resolved, HMRC may state that no further reminders will be sent and no certificate will be issued.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Guide to Stamp Duty Land Tax Forms and Letters for Transactions

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