Is there a easy way to split UK and Overseas income by the customer?

Hello Info-kiwicomposi, thanks for posting on the Community page, A customer can only have one currency so you would need to create a different customer profile for each so for example ashleigh gbp and ashleigh1 euro. 

We are still paid in GBP from the overseas company. It just won't seem to let me set that customer as overseas income.

Hello Info-kiwicomposi, so I'm not quite sure what you are asking, as you can only apply for payment in the same currency as the invoice. If you need to spilt it into different currencies you could make a holding account perhaps, it might be worth reaching out to support on either chat or phone  0808 234 5337 so you can set up a screenshare with the agent so they can see what you are trying to do. Or it may be worth reaching out to an accountant about this too.