Yes, you must give biometric data when applying for a Slovenia visa. This includes your fingerprints and a digital photograph. You need to visit the visa application centre, such as VFS Global, in person to complete this process. Biometrics are used to verify your identity and improve security. Once submitted, your biometric data is usually valid for 5 years for Schengen visa applications. If you have already given biometrics in the last few years, you may not need to provide them again, depending on the rules.