Knowledgebase Support HMRC Useful links
Knowledgebase home
Tax Return Production
Accounts Production
Practice Management
VAT Filer
CloudConnect
Anti-Money Laundering
Support home
Video Training Guides
NEW

Hot Topics
SimpleStep Guides
Release Notes
Technical
Known Issues

Service Status
Useful Links
What is MTD? Support for Accountants Support for Business
HMRC's MTD Timeline
Digital Requirements
TaxCalc's MTD Journey
MTD for VAT
MTD for Income Tax
MTD for Corporation Tax
MTD for VAT
MTD for Income Tax
MTD for Corporation Tax
Step-by-step Guide

Error 3318: The period to which the Return's Accounts applies does not coincide with the effective from/to dates of the referenced Accounts Taxonomy.

Article ID: 2658
Last updated: 09 Mar, 2023

When submitting a CT600 to HMRC you may encounter the following submission error message:

This occurs when the iXBRL tagging applied to the accounts does not meet the expected standard.

If you are using TaxCalc, please ensure you are running the latest version of the application. For more information on how to do this, please review How do I check if my TaxCalc is up to date?) Once you have successfully updated TaxCalc, you will need to remove and re-attach the accounts before re-attempting online submission. 

If you are using a third party service provider for your accounts production, you would need to contact them directly to see if they have a setting or software update available to provide the most recent iXBRL tagging regime provided by HMRC. Once you have successfully updated the tagged accounts, you will need to remove and re-attach the accounts before re-attempting online submission. 

Article ID: 2658
Last updated: 09 Mar, 2023
Revision: 7
Views: 5964
This article was:  


Also listed in
folder Tax Return Production -> CT600 Corporation Tax Return