From where can I download 2021.1 tutorials

You can access it from the link below.

https://community.altair.com/community?id=altair_product_documentation

Amlesh Lovekar said:

Thanks for quick reply but I didn't see the SIMLAB tutorial here. Where can I find it?

There are no SL training notes on the Community site. You can access the "SimLab Learning Center" site, which has over 100 training videos, from the software interface.