How to install SSIS in SQL Server 2014? I already have SQL Server 2014 on my computer. I don't remember installing SSIS.

How can I check if I do have it if not how can I add it ?

Thank you
Check your Windows Services for a service named "SQL Server Integration Services 12.0".

If you find you need to add just run the SQL Installer and choose "Add features to existing instance" and mark the option "Integration Services"