The CT600 computed from the books, filed to HMRC on your approval.
The computation from the accounts: every box of the CT600 and its supplementary pages, marginal relief, losses carried and used, capital allowances, with the computations and the accounts attached as iXBRL. A named person approves it; it goes to HMRC through the Transaction Engine with the firm's agent credentials, and the receipt is kept.
The firm's Government Gateway credentials for corporation tax are set once by a partner, kept encrypted, never shown again and never handed to an agent. The control plane alone puts them in a submission.
Three things to know first.
- The computation is the engine's
- Profits per the accounts, the adjustments, the allowances and reliefs, the tax at the rates for the period, every box filled from the figures that make it up. The agent explains; it does not compute.
- Attachments that validate
- The computations and the accounts go with the return as iXBRL on the FRC taxonomy, validated before submission, so the return is accepted first time.
- Filed through HMRC's own channel
- A GovTalk message to HMRC's Transaction Engine with the IRmark, the poll for the response and HMRC's reply read back. The receipt is on the client's file.
The corporation tax return, box by box.
The computation
From the accounts' profit: adjustments, capital allowances, losses brought forward and used, the tax at the small profits and main rates with marginal relief where the profits fall between.
Every box and supplementary page
The CT600 and the supplementary pages the client needs, filled from the computation, so nothing is keyed twice.
iXBRL computations and accounts
Tagged on the FRC taxonomy and validated, attached to the return as HMRC requires.
The payment date on the board
Nine months and a day after the period end, with the return's own date, for every company on the list.
Filed on approval
A named person approves against the computation they see. The submission goes to HMRC's Transaction Engine; the acknowledgement and the response are kept.
From the accounts to the receipt.
01
The accounts are approved
The year's accounts come out of accounts production, approved and signed.
02
The computation is prepared
The engine computes the tax from the accounts' profit; the agent writes the note on what moved.
03
A person reviews and approves
The boxes, the allowances, the losses, the relief. The approval is bound to those figures.
04
HMRC receives it
Return, computations and accounts in one GovTalk submission with the IRmark. The reply comes back onto the file and the row closes.
Straight answers.
- Does Minns file the CT600 to HMRC?
- Yes, through HMRC's Transaction Engine with the firm's agent Government Gateway credentials, as a GovTalk message with the IRmark, and the response is kept.
- Where are our Gateway credentials kept?
- Set once by a partner, kept encrypted in the control plane, never read back to a screen and never given to an agent, a box or a prompt. Only the control plane puts them in a submission.
- Does it handle marginal relief and losses?
- Yes. The computation applies the small profits and main rates with marginal relief between them, and losses brought forward, used and carried.
- Who approves the return?
- A named person at the firm, against the computation shown. A computation that changes after approval is approved again before it is filed.
Compute the next CT600 from the accounts.
Connect one company's books and we prepare its computation on the demo company first, then on yours for review.