You’ll get an error message if you don’t fill in a box that you should or if you fill in one incorrectly.
Click on the ‘?’ at the end of the box and it will tell you what information should be entered.
If the error relates to an Online Service issue, help is available here:

https://www.gov.uk/government/organisations/hm-revenue-customs/contact/online-services-helpdesk

This message was edited 1 time. Last update was at 01/11/2017 15:56:50