Ammended CT600

BIG WAL

Just taken on a new client whose CT600 is due at the end of this month to avoid late filing penalties. However, some details are lacking, so it is not realistic to do this with complete accuracy within the time scale.

Is it possible to to submit on the basis of existing documentation, and then send an amended return a month or so later, when all the information is to hand ? As the company is in a loss situation anyway, there would be no effect on the CT liability.