Firstly, if you are not already registered to use PAYE Anytime Jefferson would recommend you to do so – it has many good features such as viewing your tax your details online, claiming tax credits, and applying for tax refunds such as Health Expenses.
Secondly, Revenue has also recently published this useful PAYE Guide for employees. It helps to explain PAYE, tax credits and the new USC in a simple to read format.
All the best,
The Team at Jefferson