Register as an unemployed jobseeker with the employment office and submit your application for unemployment benefit to the office, together with the attachments. In your daily allowance application, state that you are applying for an invalidity pension. For more detailed instructions, see the section If you became unemployed.
Since the daily allowance is paid on the basis of continued sick leave, you will have to submit medical certificates to the cashier’s office to prove that your sick leave has continued. You can hide sensitive information from them.
Read more under earnings-related daily allowance for disabled.