When you claim the IRA (fill out the paperwork) the IRA will be in your son's account.
Since he is a minor, you (the parent) will also be authorized to act on the IRA on his behalf.
The 10-year rule has started, but under that rule you can elect to take no money out in any year.
A partial distribution even from a modest IRA could trigger the kiddie tax.
IRS Pub 590-B:
If the individual designated beneficiary is not an eligible
designated beneficiary, the beneficiary is required to fully
distribute the IRA by the 10th anniversary of the owner's
death under the 10-year rule.
An IRA beneficiary
is an eligible designated beneficiary if the beneficiary is
the owner's surviving spouse, the owner's minor child, a
disabled individual, a chronically ill individual, or any other
individual who is not more than 10 years younger than the
IRA owner.
