After Your MTD Quarterly Update: What to Do With Your Records Now

You've Filed. Now What?

Filing your quarterly update feels like crossing a finish line. But the moment you hit submit, a different kind of question starts nagging: what do I actually do with all these records now? Do I need to keep everything? What if HMRC comes asking? Can I delete anything?

This guide answers all of that. It covers exactly what HMRC requires you to keep after a quarterly update, how to organise it so you can find it again, what you can safely discard, and what happens if a compliance check lands in your inbox. Whether you've just filed Q1, Q2, or any other quarter, the steps are the same.

Why Post-Filing Record-Keeping Actually Matters

Filing your quarterly update does not close the book on that period. HMRC can open a compliance check (an investigation into your figures) for up to 12 months after your final declaration - and in some cases longer if they suspect serious errors. If that happens, they will ask for the underlying records that supported your filed figures.

If you cannot produce them, HMRC can estimate your income and expenses themselves, often not in your favour. Penalties for inadequate records are separate from any tax owed, and they can reach £3,000.

Keeping good records after filing is not about being paranoid. It is about being able to prove what you already told HMRC.

The 5-Year Retention Rule Explained

HMRC requires sole traders and landlords to keep their business records for at least five years after the 31 January filing deadline for the relevant tax year.

Here is what that means in practice. If you are filing quarterly updates for the 2026-27 tax year, your final declaration deadline is 31 January 2028. You must keep records relating to 2026-27 until at least 31 January 2033.

This applies to:

• Income records - invoices, rental agreements, bank receipts
• Expense records - receipts, bills, supplier invoices
• Bank statements and reconciliations
• Mileage logs, if you claim mileage
• Any calculations you used to arrive at your filed figures
• Records of adjustments, allowances, or anything you excluded from a quarterly update

Five years sounds like a long time. But it goes faster than you think, and storage is cheap. Do not start deleting things early.

For more detail on exactly which types of records count, see our guides on what counts as records for MTD and how long to keep MTD records after filing.

Immediately After Filing: The Three Things to Do First

Do these within a day or two of submitting your quarterly update, while everything is still fresh.

1. Save Your Confirmation

Every quarterly update you submit should generate a confirmation - either a reference number, a submission receipt, or a confirmation screen in your software. Save this. Screenshot it. Download it if you can.

Store it with the records for that quarter. If HMRC ever asks whether you filed on time, or questions whether a figure came from a particular period, your submission confirmation is your first line of evidence.

2. Lock That Quarter's Records

Once a quarter is filed, treat those records as read-only. Do not add to them, edit them, or move expenses between quarters without a clear reason. If you realise you made an error, you can amend your update - but do that through the proper process, not by quietly editing your spreadsheet after the fact.

Separate that quarter's folder (digital or physical) from your current working records. A simple label helps: "Q1 2026-27 - FILED 7 Aug 2026".

3. Note Anything You Need to Address Later

Sometimes you file knowing something is slightly off. A receipt you could not find in time. An expense you were unsure about. A late invoice that arrived after you submitted. Write these down now and decide later whether they need an amendment or can wait for the final declaration.

Our post on when to amend vs leave until the final declaration can help you work through this.

Organising Your Digital Records

Most people doing this themselves keep their records digitally - scanned receipts, downloaded bank statements, spreadsheets. Here is a simple structure that works.

One Folder Per Tax Year

Create a top-level folder called something like "MTD 2026-27". Inside it, create subfolders for each quarter, your final declaration, and a general folder for anything that does not fit neatly into one period.

Example structure:

• MTD 2026-27
  • Q1 (6 Apr - 5 Jul 2026) - FILED
  • Q2 (6 Jul - 5 Oct 2026) - FILED
  • Q3 (6 Oct - 5 Jan 2027)
  • Q4 (6 Jan - 5 Apr 2027)
  • Final Declaration
  • General - Allowances and Adjustments

Inside each quarterly folder, keep:

• Your filed summary (the figures you submitted)
• Your submission confirmation
• The spreadsheet or export you used to generate the figures
• Supporting receipts and invoices (scanned or downloaded as PDFs)
• The bank statement(s) covering that period
• Any calculations or notes you made

Naming Your Files Sensibly

If a receipt is called "IMG_3847.jpg", it is useless in a compliance check. Rename files when you save them. "Receipt_VodafoneBill_June2026_£48.00.pdf" takes five seconds to name and saves hours of searching later.

You do not need a complex system. Just enough that you can tell what something is without opening it.

Cloud Storage vs Local Storage

Cloud storage (such as Google Drive, OneDrive, or Dropbox) is generally safer for long-term keeping because it is not tied to a single device. Hard drives fail. Laptops get lost. If you keep records locally, back them up regularly - ideally to a second location.

HMRC does not specify where you store your digital records, only that you can produce them when asked. See our more detailed guide on setting up a records storage system that actually works.

Organising Physical Records

Some people still get paper receipts, paper invoices, or paper bank statements. You do not have to go fully digital, though it makes things easier.

If you are keeping physical records:

• Use a folder or binder per tax year, with dividers for each quarter
• File documents in date order within each quarter
• Keep a handwritten or printed summary at the front of each quarter showing the totals you filed
• Store the folders somewhere dry, accessible, and unlikely to be thrown out by accident

Consider scanning important documents even if you also keep the originals. Paper fades, gets damaged, and takes up space. A digital backup of physical records gives you both.

What You Can Safely Discard

You do not need to keep everything forever. Here is what you can get rid of:

• Draft versions of calculations - once you have a clean, filed version saved, old working drafts are not needed
• Duplicate copies - if you have both a photo and a scan of the same receipt, one is enough
• Personal receipts - anything that was clearly personal and never included in a quarterly update does not need to be filed at all
• Correspondence that is not tax-relevant - general supplier emails, delivery notifications, and similar are not records HMRC needs

What you should not discard, even if it feels unimportant:

• Any receipt or invoice that relates to something you claimed
• Bank statements covering quarters you have filed
• Mileage logs if you claimed mileage allowance
• Rental agreements, for landlords - these underpin all your rental income figures
• Any correspondence with HMRC

For landlords specifically, our guide on what counts as a landlord expense in MTD explains which types of expense records you need to support.

What Counts as Adequate Evidence

HMRC does not require a specific format. They need to be able to see that your filed figures are backed by real transactions. In practice, that means:

• For income: invoices, bank receipts, rental statements, or any record showing money came in and when
• For expenses: receipts, invoices, bills, or bank entries showing what was paid, to whom, and for what
• For mileage: a log showing dates, purposes, and distances
• For mixed-use expenses: a clear calculation showing how you worked out the business proportion

You do not need a receipt for every single small purchase. But if an expense category looks high relative to your income, HMRC will want evidence for it. Anything over a few hundred pounds is worth having a document for.

See our guide on what proof HMRC needs for MTD expenses for more detail on this.

What to Expect If HMRC Opens a Compliance Check

A compliance check (sometimes called an enquiry) is HMRC's way of checking that your figures are correct. They can open one for any quarterly update or final declaration, and they do not need a specific reason - some are selected at random.

If it happens to you:

You Will Receive a Letter

HMRC will write to you formally opening the check. This letter will specify which period they are looking at and what they want to see. Do not panic. A compliance check is not automatically a sign they think you have done something wrong.

You Will Have Time to Respond

HMRC typically gives you 30 days to respond to an initial information request. If you need more time, you can ask for an extension.

They Will Ask for Specific Records

Their request will usually be for particular categories - all income records, or all receipts for a specific expense type, for example. You do not need to send everything at once; respond to what they ask for.

Digital Records Are Fine to Send

You can supply records digitally - as PDFs, spreadsheets, or scanned copies. You do not need to post originals unless specifically asked.

Our dedicated guide on what to expect from an HMRC compliance check after MTD filing goes into more detail if you want to be better prepared.

Setting Yourself Up for the Next Quarter

Once your filed quarter's records are organised and stored, shift your attention forward. The next quarterly deadline is already approaching, and the habits you build now will determine how stressful filing is next time.

A few things to do in the first week of a new quarter:

• Open a fresh folder or spreadsheet for the new quarter
• Start logging income and expenses from day one of the new period
• Set a regular time - even 15 minutes a week - to update your records
• Reconcile your bank account at least monthly rather than leaving it all to the end

For practical guidance on keeping records clean during a quarter, see our posts on building a 15-minute-a-week record-keeping habit and handing over records after filing and preparing for the next quarter.

A Simple Post-Filing Checklist

Run through this every time you file a quarterly update:

1. Save your submission confirmation somewhere you can find it
2. Export or save your filed figures from your software
3. Move that quarter's records into a clearly labelled folder
4. Make sure every income and expense figure has supporting evidence stored with it
5. Scan any thermal receipts before they fade
6. Note any outstanding issues - late invoices, uncertain expenses, anything to revisit
7. Back up your records to at least one additional location
8. Open a fresh folder for the next quarter and start it cleanly

Keeping Records Does Not Have to Be Complicated

The paperwork side of MTD is not glamorous. But getting it right once - setting up a folder structure, building a habit of saving receipts, backing up regularly - means you will rarely have to think about it again. The goal is a system that takes minutes to maintain, not hours, and that means if HMRC ever does come asking, you are ready without any scramble.

If you filed your quarterly update through Affordable MTD, your submitted figures are stored in your account. But the underlying records - receipts, statements, invoices - are yours to organise and keep. The steps above give you a straightforward way to do that.