How can I effectively remove the yellow tone from wood?

To effectively remove the yellow tone from wood, you can sand the surface to remove the existing finish and then apply a wood bleach or wood stain remover to lighten the color. Make sure to follow the manufacturer's instructions carefully and test the product on a small, inconspicuous area first. After removing the yellow tone, you can refinish the wood with a clear coat or stain to achieve the desired color.