Corporation Tax filing software from ByteLogic.
Prepare the CT600, iXBRL accounts, and iXBRL computations before you pay. Search your company, enter the filing figures, review the draft package, then use Stripe checkout only when the return is ready to submit to HMRC.
ByteLogic Ltd builds focused Corporation Tax filing software.
The product is intentionally narrow. It focuses on the Corporation Tax return and the supporting attachments HMRC expects from commercial CT software, without exposing a full bookkeeping suite.
CT600 return production
Prepare the company return from reviewed figures, with period dates, company identifiers, tax calculation, declaration, and core CT600 boxes.
iXBRL accounts and computations
Create HMRC-ready accounts and tax computation attachments so the filing package can be reviewed before submission.
Review before filing
Walk through the figures, supporting schedules, and package contents before anything is submitted to HMRC.
From company figures to filing package.
ByteLogic keeps the accounting engine behind the scenes and exposes a simpler CT600 path for directors and small company self-filers.
Enter company details
Company number, Corporation Tax UTR, accounting period, director declaration, and contact details.
Review figures
Turnover, income, staff costs, other charges, assets, creditors, share capital, and retained earnings.
Generate package
Build the CT600, iXBRL accounts, iXBRL computations, and validation-ready XML artefacts.
Submit or export
Use direct HMRC submission when enabled, or download an evidence pack for review and assisted filing.
First release: CT600 filing for simple UK limited companies.
Early access is for small companies with straightforward trading income and accounts that can be reviewed before filing. VAT MTD, RTI payroll submission, bank sync, and Companies House filing are parked outside the first public offer.
CT600 Filing Software
Prepare and review the package first. Payment is only requested at HMRC submission.
Start CT600 Filing