To get rid of fleas on your furniture sprinkle some flea powder onto the furniture and let it sit overnight to kill the fleas.
Then vacuum the furniture in the morning to remove the flea powder and dead fleas and then go over the furniture again with an upholstery cleaner using some dawn dish soap or some upholstery cleaning detergent.
You can also sprinkle salt onto the furniture and you should do the same if you have carpet to kill the fleas there before they get back onto your furniture.
The salt will kill the fleas overnight but it's best to leave the salt on the furniture or in the carpet for at least 2 days to allow it to really kill the fleas.
Then just vacuum the salt and dead fleas out of the carpet and furniture.