How to Amend Companies House Accounts | TinyTax Support

How to Amend Companies House Accounts

id: amending-companies-house-accounts title: How to Amend Companies House Accounts category: accounts-filing tags: [amend accounts, amended accounts, replacement accounts, Companies House amendment, resubmit accounts, correct accounts, accounts error, filed wrong accounts, amend Companies House, revision, revised accounts, losses carried forward, corporation tax, CT600, accounts only, period mismatch, ARD mismatch, accounting reference date, next accounts] applies_to: [all] difficulty: intermediate last_updated: 2026-03-26 related: [filing-an-amended-ct600, companies-house-auth-codes, what-happens-after-you-submit]

If you already filed your accounts with Companies House through TinyTax and need to correct them, you can submit amended accounts. This guide walks you through the process.

When You Need to Amend

You should amend your Companies House accounts if:

  • You made a mistake in your original filing (wrong figures, missing items)
  • You need to add balance sheet line items that were left out (e.g., fixed assets, long-term creditors)
  • Your P&L figures need correcting
ℹ Companies House treats amendments as "revised accounts" — they replace the original filing. The original accounts remain on public record with a note that they have been superseded.

How to Amend Your Accounts

Step 1: Start the Amendment

  1. Go to your TinyTax dashboard
  2. Find the filing period you want to amend
  3. Click Actions ▾ next to that period
  4. Select Amend Accounts
ℹ The "Amend Accounts" option only appears for accounts that were filed through TinyTax and have been accepted by Companies House.

Step 2: Enter Your Reason and Summary

A modal will ask you two questions:

  • What was wrong with the original accounts? — Explain what needs correcting (e.g., "Turnover was understated by £5,000"). This appears in the revised accounts as required by Companies House.
  • Summary of changes being made — Briefly describe your corrections (e.g., "Corrected turnover from £45,000 to £50,000").
Both fields are required. Click Proceed to Amendment to continue.

Step 3: Update Your Figures

The amendment opens the same full submission form as your original filing. All fields are available — you can:

  • Change existing figures
  • Add values to fields that were blank in the original (e.g., fixed assets, creditors falling due after more than one year)
  • Import a trial balance or CSV if you prefer

Step 4: Review and Submit

  1. Click Preview to review your amended accounts
  2. You will see an Accounts Amendment banner confirming this is a revised filing
  3. Your reason and summary will appear in the generated accounts document as a "Revised Accounts Statement"
  4. Click Submit Accounts and enter your Companies House authentication code
  5. Your amended accounts are filed with Companies House
⚠ Amended accounts undergo manual review at Companies House and may take several days to process. This is longer than a standard filing.

What Happens After You Submit

  • The amended accounts replace your original filing on the Companies House public record
  • The original accounts remain visible with a note that they have been superseded
  • Companies House reviews the amendment manually, so processing takes longer than a standard filing
  • You will receive confirmation once the amended accounts are accepted

Common Questions

Why does the preview show a "Period mismatch" warning?

This warning is expected during an accounts amendment and does not prevent you from submitting. You can safely ignore it and proceed.

Here is why it appears: once you have filed accounts for a given period (e.g., year to 30 June 2025), Companies House records that your next expected accounts are for the following year (e.g., 30 June 2026). When you amend the already-filed period, TinyTax correctly shows your draft as being for the original period (30 June 2025), which differs from what CH expects "next" — triggering the mismatch notice. The amendment is going to the right place; the warning is simply an informational artefact of the amendment flow.

Can I amend accounts that were filed elsewhere?

No. The "Amend Accounts" option only appears for accounts originally filed through TinyTax. If your original accounts were filed through another service or via WebFiling, you will need to use that service to submit the amendment.

Do I need to amend my CT600 as well?

It depends on what changed. If your amendments affect figures that also appear on your CT600 (like turnover or profit), you should amend your CT600 separately. See our CT600 amendment guide.

Why does the "Amend Accounts" form not show losses carried forward or the tax section?

"Amend Accounts" covers Companies House accounts only — it does not include any corporation tax calculation. The losses carried forward field and the Tax Computation section belong to the CT600, which is filed separately with HMRC.

Your original CT600 — including any losses carried forward — is completely unaffected by an accounts amendment. Submitting amended accounts will not change your corporation tax in any way.

If you also need to update your CT600 (for example, because your profit figures changed), you would do that separately via Actions ▾ → Amend CT600. See our CT600 amendment guide.

Is there a fee for amending accounts?

TinyTax does not charge extra for amendments — they are included with your subscription. Companies House does not charge a fee for revised accounts either.

Can I amend more than once?

Yes. If your amended accounts are accepted and you later find another error, you can submit a further amendment from the dashboard.

Still Have Questions?

If you need help with your amendment, get in touch — we are happy to help.

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