Ct600 cannot be physically amended. | TinyTax Community
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Ct600 cannot be physically amended.

Posted by DEXTER DE LEADUS 18 Feb 2026 at 10:03
I have gone through the process but see that the ct600 is missing one critical box : 145 total turnoover from trade, and also box 4 Type of company.
I do believe it could be rejected by Companies house without box 145 filled. How do I alter it?
Thanks.

1 Comment

T
Tim Fouracre Staff 18 Feb 2026 at 10:17
I've just replied to your email with details on both points. In short — Box 145 is populated from the Turnover field in the P&L section of the form, and Box 4 is set automatically. Both will appear on your CT600.

The CT600 is submitted to HMRC rather than Companies House — they're two separate filings, and TinyTax handles both.