Florida is a "no fault" divorce state which means anyone may file a petition for dissolution of marriage, even if the other party does not want a divorce. That party can, however, request that the court order counseling sessions to save the marriage; however if those sessions do not resolve things the Court must move forward and grant the divorce.
Before that can happen, several important documents need to be filed in a divorce case. For example, Financial Affidavits are legal documents where the husband and wife swear to their income, assets, and debts. If children are involved, the parties will have to submit proposed parenting plans, which are documents that govern timesharing and parental responsibilities with regards to the children.
There are also pleadings that must be filed, including the petition for dissolution of marriage and the answer to the law suit. Often times a counter-petition must be filed as well.
If you have questions about how to file a divorce in Florida, you should contact a divorce lawyer. These are complex issues that may impact the rest of your life and therefore you should have an experienced attorney by your side.