You should use the family form anytime there is a new addition to the tree, whether it is through birth, adoption, or adding children through marriage. Documenting deaths is the next step, and on a brighter note, filling in marriages is crucial. When completing marriages you can even branch out to the in-law families, which can create a robust and in-depth family tree document. This will make the tree complete and useful for future generations.
When looking for births and other life events Familysearch.org reminds us that not all of the states allow access to these types of records. In the United States, some counties keep the documents stored online, but in some places, the next of kin must request the birth, death, or marriage certificate from the government.
Vital records are described as birth, death, marriage, or divorce certificates. The CDC/National Center for Health Statistics List is compiled of all 50 states. The list guides you to where certain documents are held in each state, and the guide tells you how and where to request a copy plus any fees involved.