I have just posted the following on HMRC's Agent Forum:
"I have looked in the 30 day CGT system this morning to obtain information about my client’s CGT submission and payment. It has all gone.
I have checked for other clients and the information has gone from their accounts as well, including one where the submission was made as recently as January. The only option that is offered is “Start new return”, or sign out. You cannot see previous submissions or payments any more.
It is 6 April today. Is this connected? Does the system wipe all records at the beginning of a new tax year? Or after a certain number of months?
Please can another tax adviser check a more recent submission and see what has happened there.
HMRC what is to be done?"
Have other advisers found the same problem?