I think the cut off age for a child of deceased is 18. I know you can't collect SS on a 20 year old as one person posted. That is incorrect information.
Your lawyer will have to answer the question about getting money owed from child support. You may be able to get that from his estate. You should be able to get survivors benefits for your boys through his Social Security benefits. All you have to do there is contact your local Social Security Administration office.
If you do get money from his estate toward back child support owed, it may affect the amount of SS benefits, but again, you would need to check with both your lawyer, and SSA office. Best of luck to you.
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