The simple answer is unlimited times, once you have paid for your Will you can make as many changes as and when you wish without further payment. Your Will be done is the only will service that allows this.
Welcome to our (somewhat informal) Blog section. Here's where we get together to share Ideas, Tips and Good News. Partly because we're all about good service... and partly because we're real people that believe in making life a little better for everyone while we're here : )