How to you go about checking on minor settlement trust account?

The Trustee of the trust is supposed to provide at least an annual accounting to the beneficiary. If your son has not been provided an accounting, then you (or whoever is empowered to act on his behalf if he has a legal guardian or conservator appointed that is not you) should request that the Trustee provide one. Once the accounting is received, your son can have a third party review it. If the Trustee does not provide an accounting in a prompt manner, or if it appears that anything is wrong or missing, then your son should be able to petition an appropriate court to have the Trustee compelled to provide the accounting or the missing information. However, be sure to review the trust agreement itself very carefully to make sure that any timing requirements on requesting an accounting, providing an accounting, and challenging a provided accounting are understood and can be complied with. Please also note: the Trustee's attorney does not represent your son- the Trustee's attorney represents the Trustee. Your son is entitled to his own trust attorney if he feels like his interests are not being properly respected by the Trustee.