Taxpayer's dependent son (age 16) received $13,884 in Social Security Benefits in 2020. His father had passed away a year or so ago. His mother remarried.

Further, because he received SS benefits, IRS sent the dependent the EIP2 of $600.  IRS also sent $1800 ($600 x3) to his mother and new husband. Looks like $600 too much.....

Any advice?