HM Revenue & Customs (HMRC) will describe here any current important issues that customers using this online service may come across. They will let you know what to do if you are affected. HMRC are sorry for any inconvenience these may cause. If you need help with anything not listed here, please visit our Frequently Asked Questions or contact the Online Service helpdesk.
For assistance with resolving some of the more common error messages encountered when completing the HMRC accounts template, please view our accounts template error message guide.
We are currently investigating an issue affecting some of the losses information displayed on the Trading losses summary page where previously entered data is not displayed. This is a 'display only' problem and does not affect the losses data entered and submitted to HMRC.
If you feel you are affected by this issue we recommend you first check the Computations losses data in the Output file (select view and print link) where the loss data should display correctly, before you submit to HMRC.
HMRC apologise for any inconvenience.
If after considering the above, you continue to experience a problem, please contact the Online Service helpdesk.
We are aware that some customers may receive a System Error message when trying to download the HMRC CT600 tax return.
This error can be generated for the following reasons:
1. You are attempting to download a return shortly after activating the Corporation tax online service. You need to wait approx. 48 working hours after service activation before you attempt to download.
2. You are attempting to download a return whilst using foreign language settings in your Internet Browser. You need to ensure your Browser is set to use an English Language setting.
If after considering the above, you continue to experience this problem please contact the Online Service helpdesk.
We are aware that some customers are initially unable to download the new HMRC CT Online filing software and are receiving an error message advising that either ‘pdf couldn’t be downloaded’ or ‘Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later’.
If you use Microsoft Internet Explorer you may need to adjust your settings to successfully download the software.
We have provided some guidance for customers who may need to do this.
If you are still unable to download after following the guidance please contact the Online Service helpdesk.
Before Adobe Reader will allow you to use the HMRC CT Online filing software you will need to enable the security trust settings once the form has been successfully downloaded. We have produced a handy Guide on changing trust settings and common problems with solutions to assist you with these changes. For information: You can also access these instructions from the ‘Introduction’ screen within the form once it has been downloaded.
If you are still experience problems with the trust setting changes after following the guidance please contact the Online Service helpdesk.