This idea has been merged into another idea. To comment or vote on this idea, please visit UKCOMP-I-6 Double Taxation Relief │ Corporation Tax.
there are several countries with whom UK has tax treaty and if the CT600 has a box for it, you should be able to populate the boxe correctly
Kate Schofield
I will merge this idea with https://sageukcompliance.ideas.aha.io/ideas/UKCOMP-I-6
Which is currently in development for an Autumn update.