I would like to transfer money from overseas bank account in England, of a family member to my account in the US. What are my obligations on that issue, its not a gift. And its an amount exeeding $250,000usd

Rules on transfer money from overseas account of non u.s resident

While there are no transfer taxes, you will need to submit Form 3520 to report the money transfer and explain the nature of the transfer.

Information only; no tax will be assessed.