Navigate to SoundClick.com. Click the "Log In" button and enter your username and password. Click "Sign In."
Click on your artist name. Click the "Songs" tab. Click the "More" link next to "Songs."
Click on the song title to which you want to add a download link. Scroll down to the "Download Option" section under "Song Distribution."
Click the "Free MP3 Download" radio button to allow listeners to download the song for free. If you want to sell the download, click the "Paid Download" button, then select a price from the drop-down menu next to "Sell as MP3 Single."
Click "Save Changes" to add the download link to the song's SoundClick page. Repeat the process for any other songs to which you want to add a download link.