If you are resident in the US, your boys will be required to have some form of education provision. What the rules and requirements are will depend a great deal on exactly where you live, since each state operates largely independently of each other in education.
However, in most instances, children of 7 and 8 will have to be in school of some kind that is accredited by the state, or in home schooling, which will have to fit within your state's guidelines.
The place to start would be to contact not a specific school, since you may not know exactly which one is appropriate for your specific residential address, but the local school board office - all areas have a school board or equivalent which is responsible for managing and running local schools.
If you don't know how to contact this body, the local government office - 'City Hall' or County Administration - will be able to tell you.
The school board will be able to identify the school and likely also provide you with basic information about their, and your, legal responsibilities as defined by the state.
Most schools will have some forms of provision for children who don't fall into mainstream learning, but in most cases this would require the children to be enrolled in the school first, and then the school itself to perform an 'IEP' (Individualized Educational Provision) study in which they evaluate the individual child's needs and learning skills, and try and mould the study experience of each to fit.
Some schools, some school boards, and some states are better at this than others, but they are all a lot better at it now than they were even a few years ago. For example, some school systems have home schooling programs based around a teacher actually coming to your home for an hour or two per day, to cover the basics and get the children started on studies. Others have special schools, which are not the places of old so much as intended to provide a higher density of teachers for smaller class groups.
Only your specific school system will know what their options and provisions are, and what is available, so they are your first post of call to get started.
If your children have formal autism diagnoses, make sure you pass that information on so they know from the start. If they have never had any formal education experience before, make that fact known too, because it will help the school system understand how best to get them started, rather than simply drop them into their age-appropriate classes as if they had already covered the first few years of material.
Lastly, most school systems are used to new arrivals, and also to children who have unusual or different educational needs. The more you can tell them, the better they can tailor the response to your particular children.
