41 C.F.R. § 102-36.215 How do we report excess personal property?
Title 41 - Public Contracts and Property Management
Report excess personal property as follows: (a) Electronically submit the data elements required on the Standard Form 120 (SF 120), Report of Excess Personal Property, in a format specified and approved by GSA; or (b) Submit a paper SF 120 to the regional GSA Personal Property Management office.
Title 41: Public Contracts and Property Management
PART 102–36—DISPOSITION OF EXCESS PERSONAL PROPERTY
Subpart D—Disposition of Excess Personal Property
Reporting Excess Personal Property
§ 102-36.215 How do we report excess personal property?

