# GovTalk Form Submission to ammend Accounts / new accounts? **URL:** \ **Category:** Accounts\ **Created:** [March 29, 2026, 12:57pm UTC](https://xmlforum.companieshouse.gov.uk/t/govtalk-form-submission-to-ammend-accounts-new-accounts/1924 "2026-03-29T12:57:31Z")\ **Posts on this page:** 4\ **Page:** 1

**Author:** ![JohnLeeDevelops](https://xmlforum.companieshouse.gov.uk/user_avatar/xmlforum.companieshouse.gov.uk/johnleedevelops/32/212_2.png) [@JohnLeeDevelops](https://xmlforum.companieshouse.gov.uk/u/JohnLeeDevelops)\ **Post date:** [March 29, 2026, 12:57pm UTC](https://xmlforum.companieshouse.gov.uk/t/govtalk-form-submission-to-ammend-accounts-new-accounts/1924/1 "2026-03-29T12:57:31Z")

Hi I’m trying to upload/ammend my accounts to Companies House I get the following error And I am confused. FormIdentifier does not match content in Form element. Also is there a test server I can use for development. Many Thanks Jonathan Lee send the following data. ```auto 2.0

AnnualReturn request submit XML 0 1774788252873 .... clear Principal ....

... HMRC 0000 Harmony Accounts 0.0.1 Accounts .... 0 EXAMLPLE LTD AAAAAA EXAMPLE PACKAGE 2025-09-22 ... EXAMPLEaccounts20250731.xhtml application/xhtml+xml ACCOUNTS ``` And got the following response.’ ```auto 1.0

AnnualReturn error 1774788252873 2026-03-29T13:45:19-00:00 7ff8cb8cfb96604c5fe49ca3cc90387b CHMD5 0c7e611efbfdbbba4b9dbc9251b57029

AnnualReturn 9999 fatal FormIdentifier does not match content in Form element ``` ---

**Author:** ![kadach](https://xmlforum.companieshouse.gov.uk/letter_avatar_proxy/v4/letter/k/3be4f8/32.png) [@kadach](https://xmlforum.companieshouse.gov.uk/u/kadach)\ **Post date:** [March 30, 2026, 2:26pm UTC](https://xmlforum.companieshouse.gov.uk/t/govtalk-form-submission-to-ammend-accounts-new-accounts/1924/2 "2026-03-30T14:26:07Z")

Hi @JohnLeeDevelops Thank you for your post. The class field should be Accounts just like Accounts. Thanks, KAJ ---

**Author:** ![JohnLeeDevelops](https://xmlforum.companieshouse.gov.uk/user_avatar/xmlforum.companieshouse.gov.uk/johnleedevelops/32/212_2.png) [@JohnLeeDevelops](https://xmlforum.companieshouse.gov.uk/u/JohnLeeDevelops)\ **Post date:** [March 30, 2026, 8:03pm UTC](https://xmlforum.companieshouse.gov.uk/t/govtalk-form-submission-to-ammend-accounts-new-accounts/1924/3 "2026-03-30T20:03:13Z")

Thanks for your prompt reply. Ok I see the data has to align with FormSubmission-v2-11.xsd Now my next question is how do I set my software up to be a valid software vendor as I get the following error after amending the Class field. ```auto Accounts 9999 fatal The package reference 'Harmony Accounts' is invalid ``` ---

**Author:** ![kadach](https://xmlforum.companieshouse.gov.uk/letter_avatar_proxy/v4/letter/k/3be4f8/32.png) [@kadach](https://xmlforum.companieshouse.gov.uk/u/kadach)\ **Post date:** [March 31, 2026, 6:40am UTC](https://xmlforum.companieshouse.gov.uk/t/govtalk-form-submission-to-ammend-accounts-new-accounts/1924/4 "2026-03-31T06:40:49Z")

Hi @JohnLeeDevelops Please see our guidance for more information - [Important information for software developers - read first - GOV.UK](https://www.gov.uk/government/publications/technical-interface-specifications-for-companies-house-software/important-information-for-software-developers-read-first). Thanks, KAJ