I am confused by your question so I will answer in 2 ways.
If you were married to the children's father until after the child turned 18 then you would not be entitled to any support since he was there to offer support until the child came of age.
If you were divorced or separated, and there was a court order saying he had to pay XXX amount per month, and it was not paid, you will be entitled to that money until the day your ex dies! It doesn't matter how old the child/adult is, if the money was ordered and never paid, then it is still owed. But, you must maintain a claim at least every 24 months.
Child support is primarily governed by state laws. Each state has its own laws and enforcement mechanisms regarding child support. Federal law provides certain guidelines and regulations to ensure consistency in child support enforcement across states. However, the enforcement of unpaid child support is typically handled at the state level.
The will cannot be challenged; however, the State's child support agency may file a claim on the estate.
There is no statute of limitations on collecting unpaid child support.
Only the courts can forgive unpaid support. And only that not owed the state directly due to the mother being on Welfare at some point.
Most jurisdictions separate child support matters from other civil suits. In any case, I suggest that you contact your State's child support agency. They have ways of collecting unpaid support.
There is no constitutional right to avoid child support. Federal and State law and regulation give the States wide powers to collect unpaid child support, and for good reason.
Once you convert your inheritance into real estate or some sort of savings, the State can (and should) place a lien on that asset to collect unpaid child support.
Assuming you mean, 'How much child support can Washington State take from a lawsuit,' the likely answer is: the balance of the unpaid (past-due) support, less any funds taken by creditors with higher priority.
In the state of Florida a creditor is only allowed to garnish a certain amount of your wages up to twenty five percent only if you meet a certain threshold or if it is in regards to child support , alimony , unpaid property taxes or unpaid federal student loans.
The IRS does not garnish these payments (except from their employees). The IRS will, at the State's request, intercept tax refunds to collect unpaid child support.
If it's a lot (say, $1M+), it might increase one's support. If there's unpaid support, the State will probably seize the winnings.
Only if the state[s] are collecting an additional amount for unpaid, past-due support.