Usually, you dependents have an SSN and requirement to maintain an address on record, as well as a birth certificate indicating who their parents are. IRS coul

Usually, you dependents have an SSN and requirement to maintain an address on record, as well as a birth certificate indicating who their parents are. IRS could possibly reach into some of that. Or it simply relies on what you reported last year. But sure, you'll have to correct some details every few years. This might also be the case if you have income from bitcoin, etc.