Does the Software Comply with CT600, HMRC, and iXBRL Requirements? | TinyTax Support

Does the Software Comply with CT600, HMRC, and iXBRL Requirements?

What Does TinyTax File?

TinyTax is HMRC-approved software for filing UK corporation tax returns (CT600) and company accounts. Here is what the software covers:

CT600 to HMRC

TinyTax generates and submits your CT600 corporation tax return electronically via HMRC's approved XML gateway. The software:

  • Populates all required CT600 boxes automatically from your figures
  • Calculates corporation tax including marginal relief where applicable
  • Handles periods over 12 months by splitting into two returns (first 12 months, then the remainder)
  • Supports both trading and dormant company scenarios
  • Uses HMRC's current approved CT600 schema

iXBRL Accounts (HMRC Requirement)

HMRC requires company accounts to be attached to the CT600 in iXBRL format. TinyTax generates these automatically:

  • Micro-entity accounts (FRS 105): for companies meeting at least 2 of: turnover ≤ £632k, balance sheet ≤ £316k, employees ≤ 10
  • Small company accounts (FRS 102 Section 1A): for companies above micro-entity thresholds but within small company limits
The iXBRL accounts are attached to your HMRC submission automatically — you do not need to create or upload them separately.

Companies House Accounts

TinyTax also files your statutory accounts with Companies House as a separate submission. The same figures you enter for the CT600 are used to generate the Companies House filing.

What Is Not Covered

  • Personal tax (Self Assessment)
  • VAT returns (MTD VAT is a separate product)
  • LLP or partnership accounts
  • CIC34 report (filed separately with Companies House directly)
  • Overseas company filings

Common Questions

Is TinyTax HMRC-approved?

Yes. TinyTax is recognised commercial software for CT600 filing and meets HMRC's requirements for electronic submission.

Does TinyTax use the current CT600 schema and iXBRL taxonomy?

Yes. The software is updated to use the current HMRC-approved CT600 schema and accounts taxonomies.

Can I file for a dormant company?

Yes. Dormant company CT600 and accounts are fully supported. Select "Dormant Company" when starting a new filing.

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