Question
How often do I need to water it and should I have it by a window for sunlight?  The leaves are turning yellowish and falling off!  I didn't have it by a window.  I waited until it was totally dry before I watered it.  What should I do?

Answer
Toni,
I think you let your plant go too dry in between waterings...Water your rubber tree plant in the following manner. I water most of my plants this way.

Check how much the plant weighs when thoroughly watered VS its' weight when it is ready to be watered again. Sometimes it helps to put a saucer under the pot and let the plant sit in water for 10-15 minutes. After that pour off the excess water. Pick the pot up ( or lean it if it a large pot ) and feel how heavy it is after watering it thoroughly. Don't water it again until it feels considerably lighter and the top of the soil is light in color. Mother Nature doesn't water once a week/ month/ etc. ...Depending on plant types, sunlight exposure and pot size plants will need water at many different rates from once a day to once a month or more. You should turn the plant a 1/4 turn once per week to keep the growth even. Plants do need to be fertilized every month or so during their active growing period to stay healthy...
They do not like direct sunlite unless it is morning sun...Moving a plant from a bright area to a less light situation usually will cause leaf yellowing and leaf drop...They are grown in the shade in FL...

Remove yellow leaves when they become unsightly...
Hope this helps. Do let me know either way if you like the advice or not.
Rick in Southern NJ