How to Check Whether Your CT600 Was Successfully Submitted | TinyTax Support

How to Check Whether Your CT600 Was Successfully Submitted

Once you have submitted your CT600, TinyTax updates your dashboard to show the result. This guide explains how to check whether your CT600 submission was successful.

Checking Status in Your Dashboard

After submitting, find your company row on the dashboard. The CT600 column shows the submission status:

IconMeaning
Green tickCT600 filed and accepted by HMRC
Clock iconSubmitted to HMRC — awaiting response
Red crossRejected — action required
Empty circleNot yet filed
If you see a green tick in the CT600 column, your submission is complete. If you see an empty circle, the CT600 has not been filed through TinyTax.

What If I Filed the CT600 Outside TinyTax?

TinyTax only shows filings made through TinyTax. If you filed your CT600 directly via HMRC's Government Gateway, or through a different software provider, it will not appear in TinyTax'.

To verify a CT600 filing made outside TinyTax:

  1. Log into your HMRC business tax account at gov.uk
  2. Navigate to Corporation Tax
  3. Check your filing history — accepted submissions appear there

Companies House Accounts Are Separate From the CT600

These are two separate filings that go to different destinations:

FilingDestinationColumn on dashboard
CT600 (corporation tax return)HMRCCT600 column
Annual accountsCompanies HouseAccounts column
A green tick in the Accounts column confirms your accounts were accepted by Companies House — it does not confirm your CT600 was filed with HMRC. Both columns must show a green tick for the full filing to be complete.

When you use the CT600 and Accounts option in TinyTax, both are filed in a single step and both columns update once accepted.

Common Questions

My accounts are accepted but the CT600 shows as not filed — what should I do?

This means you filed accounts to Companies House but the CT600 to HMRC has not yet been submitted. From your dashboard, click File on your company row and choose CT600 to complete the HMRC submission.

HMRC has not confirmed receipt — is there a delay?

HMRC's Corporation Tax Online service (CATO) can take 3-5 working days to reflect recent submissions. Your TinyTax dashboard updates faster — if the status has not changed from a clock icon to a green tick within 30 minutes, check the HMRC website for any system notices.

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