CT600 Corporation Tax Filing
Property Cashflow Ltd · Accountant Portal
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Upload
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Review
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Calculate
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Submit
Upload Financial Documents
Upload the Balance Sheet and P&L PDFs from your accounting software. Figures are auto-extracted — you'll review and correct them in the next step. You can also skip the PDFs and enter figures manually.
Company Information
Company Name
Company Number
Unique Taxpayer Reference (UTR)
Found on any letter from HMRC addressed to the company. 10 digits.
Director / Signatory Name
Accounting Period Start
Accounting Period End
Average Employees During Year
Associated Companies
Other companies under common control (affects CT thresholds)
HMRC Filing Mode & Gateway Credentials
Choose how to submit this CT600:
🧪 Test Gateway
Submits to HMRC's test environment only. Safe to use for practice runs. No real filing takes place.
🔴 Live — Real Filing
Submits a real CT600 to HMRC. Use the client's actual Government Gateway credentials below.
Government Gateway User ID
The director's HMRC online login username (usually 12 digits). Found at:
www.gov.uk → sign in → HMRC online services
. Ask the director to check their HMRC welcome letter or the "Your tax account" page.
Government Gateway Password
The password the director uses to log into their HMRC online account. This is sent directly to HMRC's servers and is not stored anywhere.
Upload PDFs — optional, figures auto-extracted
Balance Sheet PDF
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Drop Balance Sheet PDF here
Profit & Loss PDF
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Drop Profit & Loss PDF here
Continue to Review →