Chris123

Hello,
I have recently submitted a capital gains real time transaction but have realised that I made a mistake in the submission.
The submission reference number which I received does not start with "RTT".
When I tried to update the transaction capital gains real time report online, and entered the submission reference number, it did not work (it says "Enter a valid report reference number").
Is there any other way to amend a capital gains real time transaction submission, and if yes, how?
Could you advise please