# HMRC Company Tax Return service closed: what a company does now - DIY Accounting Submit

Source: https://submit.diyaccounting.co.uk/hmrc-company-tax-return-service-closed.html

HMRC's online service for company accounts and the Company Tax Return closed on 31 March 2026. A company now files with commercial software. Submit files the annual accounts at Companies House.

- [File company accounts](https://submit.diyaccounting.co.uk/micro-entity-accounts.html)

## What closed

The 'File your accounts and Company Tax Return' service of HMRC closed on 31 March 2026. GOV.UK says what to use instead.

The ‘File your accounts and Company Tax Return’ online service closed on 31 March 2026. From 1 April 2026 you should use commercial software to file annual accounts and Company Tax Returns with HMRC.

[gov.uk/guidance/closure-of-the-service-to-file-your-company-accounts-and-tax-return](https://www.gov.uk/guidance/closure-of-the-service-to-file-your-company-accounts-and-tax-return) Retrieved 13 November 2026

## What a company does now

- File the annual accounts with Companies House. Submit does this for [micro-entity accounts](https://submit.diyaccounting.co.uk/micro-entity-accounts.html), [small company accounts](https://submit.diyaccounting.co.uk/small-company-accounts.html) and [dormant company accounts](https://submit.diyaccounting.co.uk/dormant-company-accounts.html).
- File the Company Tax Return (CT600) with HMRC through commercial software.

## When each is due

The accounts and the Company Tax Return have separate deadlines.

File annual accounts with Companies House 9 months after your company’s financial year ends

[gov.uk/prepare-file-annual-accounts-for-limited-company](https://www.gov.uk/prepare-file-annual-accounts-for-limited-company) Retrieved 13 November 2026

The deadline for your tax return is 12 months after the end of the accounting period it covers.

[gov.uk/company-tax-returns/deadline-and-penalties](https://www.gov.uk/company-tax-returns/deadline-and-penalties) Retrieved 13 November 2026

## What Submit files

Every filing and the channels that offer it are in the [availability table](https://submit.diyaccounting.co.uk/mtd-calendar.html#availability).

Submit files annual accounts at Companies House.

Submit's Company Tax Return (CT600) filing awaits HMRC recognition. Until then it runs on our simulator only and files nothing.

## Ready to file

- [File company accounts](https://submit.diyaccounting.co.uk/micro-entity-accounts.html)

See every date on the [MTD calendar](https://submit.diyaccounting.co.uk/mtd-calendar.html).