To remove an ink stain from your suede couch, you can start by wiping the stain gently with vinegar and a soft rag. Continue dabbing the stain, adding more vinegar as necessary, until the ink no longer transfers to the rag. If the stain persists, you can rub rubbing alcohol onto the ink with a cotton swab, using new cotton swabs as necessary. Lastly, you can use fine grit sandpaper by gently rubbing it over the stain.