How to export a multitrack session?

Hi! My name is Max and I’m a CEO and mixing and mastering engineer in [Advertising is not permitted]
A lot of my customers use Audacity, and they often asked me how to export multitrack sessions correctly. So is there any manual so I can share it with my customers? Thanks!

Exporting for what? Do mean mixing down a multi-track project, or do you mean exporting separate tracks to import into a DAW, or something else?