I had a 7752 error message when trying to file a CT600 return online this morning, despite HMRC website saying this generic error was resolved on 17 April. 40 minute wait on HMRC online services helpline and still hanging on. Anyone else getting this filing error message?
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Resolved
This was indeed resolved and we have had no problems since.
Have you got the company registration number entered correctly?
It always used to be the fact that when entering the CRN that you got this error if either the number was wrong or you included a leading zero. Don't include the leading zero and try again.