The option to calculate the Corporation Tax is currently not supported in the UK edition of Zoho Books. You have to calculate it manually over your profit.
However, once you have calculated your Corporation Tax you can record both the tax owed and the payment for the same in Zoho Books by following the steps below:
Create an Other Current Liability account called “Corporation Tax Account”. You can use it to record the liability as a Journal entry and the payment as an Expense.
and GST filing.