Corporation tax software your practice can run from accounts to HMRC submission directly.
Let AI Agent run your CT600
Build computation
"Build the corporation tax computation for last accounting period for this client in Xero, working from the audited trial balance. Start from accounting profit, apply add-backs for disallowed expenses, depreciation and entertainment, deduct capital allowances and apply the corporation tax rate including marginal relief where in band. Track losses brought forward and losses available for carry-back. If a disallowed expense is new or unclear, ask me whether to follow the prior year or open a fresh entry. Pause before locking the computation. Ask me where the practice keeps the client's tax memorandum. Save the computation and working papers to Google Drive ready for senior review."
Claim allowances
"Maintain the capital allowances pool for this client in QuickBooks and apply this year's claims. Carry forward the main rate, special rate, single-asset and short-life pools from the prior year, add this year's additions per supplier invoice and check the AIA eligibility. Apply full expensing for qualifying plant and machinery on the main pool. If an asset's classification is unclear or the client has not flagged a disposal, ask me whether to chase the client or to assume continuity. Pause before crystallising a balancing allowance. Save a note for the practice manager listing claims proposed, items awaiting client confirmation and any pool movements that need senior review before the CT600 is finalised this period."
Tag iXBRL
"Apply iXBRL tagging for this client's statutory accounts and tax computation in Sage 50 using the current FRC Detailed Tagging List. Tag every primary statement, every note required by the DPL and every accounting policy disclosure. Validate the tagging against the FRC schema, check mandatory tags are present and review recommended tags against the practice's tagging policy. If a disclosure cannot be tagged automatically and a custom tag is needed, ask me before adding it. Pause before locking the iXBRL package. Ask me where the practice files the prior year's tagged accounts as the reference master. Save the tagged accounts and validation log to Google Drive ready for the CT600 submission attachment."
Submit to HMRC
"Submit this year's CT600 to HMRC for this client from FreeAgent through the practice's Agent Services Account. Attach the tagged statutory accounts, the tax computation and any required supplementary pages (CT600A directors loans, CT600C group relief, CT600L R&D additional information). Confirm the receipt reference returned by HMRC, schedule the corporation tax payment for the due date and reflect the liability in the ledger. If HMRC returns a validation error, read the error and prepare the correction for senior review. Pause before resubmitting. Ask me where the practice files the receipt evidence. Save a note for the practice manager listing submission status, receipt reference and payment timing."
Automated CT600 filing with AI Agents
Tax computations, CT600 box-fills, R&D claims and supplementary pages stop running on senior time per client. The AI Agents prepare the return across the corporate-tax book, which is where the up to 80% lower cost to serve per CT600 comes from, with manager review held on judgement.
CT600 prep that learns each client's tax position
Corporation tax is mostly continuity. Minded carries each client's losses brought forward, capital allowances pool, group relief patterns and prior R&D claims. The next CT600 starts where the last one ended. Tie this to year-end close with AI so audited accounts feed the CT600 directly.
One CT600 flow across Xero, QuickBooks, Sage 50 and FreeAgent
A real practice prepares CT600 returns for clients on Xero, QuickBooks, Sage 50 and FreeAgent at the same time. The same computation, allowance, tagging and submission motion runs against each ledger. See statutory reporting with AI and MTD compliance with AI for the adjacent compliance work.
How is this different from TaxCalc or IRIS Personal Tax?
TaxCalc and IRIS are tax-return software that expect typed entries on the form. Minded prepares the CT600 from the audited accounts directly: computation, allowances, supplementary pages and iXBRL tagging, with the form pre-populated and the working paper attached for senior review.
How does the agent compute capital allowances and the AIA?
The agent maintains the capital allowances pool per client (main rate, special rate, single-asset pools and AIA-eligible items), claims the Annual Investment Allowance up to the agreed limit, and applies the full expensing rules for qualifying plant and machinery on the relevant pool.
Can the agent prepare R&D tax relief and CT600L claims?
Yes. For eligible clients the agent prepares the R&D claim with the technical narrative drafted from the client's input, computes the qualifying expenditure under the SME or RDEC scheme as applicable, prepares CT600L and the additional information form, and pauses for senior sign-off before submission.
What about loss relief, group relief and CT600C carry-back?
Losses brought forward, losses carried back, group relief surrenders and capital losses are tracked per client across periods. The agent prepares CT600C for group relief, drafts the carry-back claim where beneficial and surfaces the optimal use of losses for the senior to review.
How does iXBRL tagging work and which DPL does the agent apply?
The agent applies the current FRC Detailed Tagging List to the statutory accounts and the tax computation, validates the tagging against the FRC schema and produces the iXBRL package ready to attach to the CT600. Mandatory tags and recommended tags are reviewed before sign-off.