What is this mysterious deposit in my bank account from the US treasury?

This note identified the deposit: DEPOSIT US TREASURY 310


TYPE: SSA ERP ID: 3101036216 CO: US TREASURY 310





I did not apply for SSI as did previous questioners with similar deposits. What could it be?
What is this mysterious deposit in my bank account from the US treasury?
If the amount of the deposit is $250, it's your stimulus payment that the President gave all SSI, SSA and SS beneficiaries in February, 2009. Enjoy the wealth ???!!!
Reply:that would be your tax refund