If you specifically need Total Security features (like the VPN or Password Manager), Kaspersky offers a 30-day free trial of their premium suites.

Instead:

If you already possess a legitimate activation code for Kaspersky Total Security, it is often still valid for the newer versions. Upgradability : A KTS key can often be used to activate Kaspersky Plus

Sites offering "free keys" often distribute malware themselves.

for its Premium suite. This gives you full access to all features without needing a credit card upfront. Kaspersky Free : There is a completely free version