How do the spouses of F4 relatives immigrate to the United States as family members of the same age?

Hello, you don't need to submit spouse information in the first step of relative immigration application. After your husband's application is approved, the National Visa Center will inform your husband and his sister to submit visa fees and documents if the schedule comes again (F4 category is about 13). You only need to provide your information in this step. Then you can get a green card with your husband.