Registering for income tax is necessary after getting your job. To register for tax you need to apply for a Tax Credit Certificate.
Personal Public Service Number (often abbreviated to PPS or PPSN) is a unique personal identification number that is used when dealing with public bodies in Ireland.
To open a bank account in Ireland you will need Proof of Identification and Proof of address. Obtaining an acceptable Proof of Address, can be a challenge. Find out how to open your first bank account.