W4

I can't figure out how to fill out my w4. We also have a business that my husband works and I am an owner too.  I don't know how to figure out income for business because we don't know how much we will make each year. Its a landscape business so income varies. There has been no federal or state taxes being taken out of my checks.  I can't seem to find anyone around town to help me get this figured out. We also have a dependent. They have made filling out w4s ridiculously hard now. So frustrating.  Help Please!