It has dried on the carpet
you can buy a tar remover from any janitorial supply store. this easily removes tar but I would rent a steam machine to clean the carpet and work on the stain or just call a cleaning company to come in and do this for you.
Tar is one of those hard to remove stains from carpet. Left alone or removed improperly and a tar stain can ruin your carpet. Dry cleaning solvent is most recommended to remove a tar stain from carpet. Apply the solvent to a clean white (slightly damp) towel. Blot the towel on the tar stain. Usually the tar stain will come up quickly with this method; however you may need to repeat the procedure several times to get all the stain up. After you have removed all the tar, spritz with tap water and blot again. This method can be used to remove grease, oil and crayon as well.
Go to an auto parts store and purchase a can of aerosol brake cleaner. Spray it on the tar and dab it up with a terry cloth towel as it softens and comes loose. This product smells a little so air out the room after use.
Tar remover for automobile carpet and upolstery cleaner.
Try Folex , Home Depot or Lowe's sells it. It got paint out of my carpet.
