You can list up to 3 primary artists per release. Your release will show up on each artists' pages, in stores & streaming services.
To specify a collaboration, just use a ampersand ("&") in your artist name. DistroKid will automatically detect this, and ask you if it's a band name, or a collaboration. Select collaboration.
Please note: collaborations take up an artist slot, even if one of the artists is already being used on your account. If you need more artist slots, you can upgrade your account.