Flexible Spending Account (FSA) frequently asked questions

If you want to understand more about FSAs, here are answers to some of the most frequently asked questions:

What is a Health Flexible Spending Account (FSA)?
How does a Health FSA work?
How much can I contribute to a Health FSA?
How do I estimate how much to save in my Health FSA?
What expenses are eligible for reimbursement with a Health FSA?
What is a Limited Purpose FSA?