The option to submit the CT600 form is available exclusively in QuickBooks Online Accountant at the moment, admin339. You can invite an accountant to ensure compliance with tax regulations imposed in your country. Use the information below to proceed.
Please know that we currently don't have updates regarding the availability of the Corporation Tax return (also called CT600 form) filing in QuickBooks Online (QBO) in the future.
In the meantime, you can invite your accountant to assist you in handling the CT600 form. You'll want to look for one through this website: Find a Chartered Accountant Near You.
Here's how to invite your accountant to QBO:
- Access your QBO company as a primary admin.
- Click the Gear icon, then Manage users.
- Select the Accounting Firms tab.
- Enter the accountant's email address if it's the first time inviting them, then click Invite. Verify your account by following the prompts.
- If you are adding a second accountant, select Invite. Provide their name and email address, then click Save.

To determine what happens when you invite your accountant, refer to this article: Add accountant users in QuickBooks Online.
Additionally, I recommend sending feedback to our product development team regarding the availability of CT600 form submission in QBO. They could consider your input and potentially incorporate it into future updates, improving the management of tax liabilities.
When everything is ready, here's some helpful material for preparing and submitting the CT600 form: File your Corporation Tax return using Workpapers in QuickBooks Online Accountant.
We encourage you to reply below if you have more questions regarding the Corporation Tax return or other QuickBooks Online-related concerns. You can count on us to be available to address all your inquiries.