When you leave your job, Revenue will receive from your employer the details about your salary and tax deductions made, as well as your leaving date.
You will be able to access this information using myAccount.
A claim for unemployment repayment can be submitted as follows:

To claim a refund:
Sign in to to myAccount and select ‘Claim unemployment repayment’ on the PAYE Services card.
When calculating tax refunds, the taxable amount of various social welfare payments is taken into consideration by Revenue.
If you need help with reviewing your personal taxes or tax reliefs, please schedule a FREE call to discuss your situation.