REIT: Real Estate Investment Trust
REMIC: Real Estate Mortgage Investment Conduit
RF&P: Retailers, Food & Pharmaceuticals
RFC: Regulated Futures Contract
RFP: Retailers, Food and Pharmaceuticals
RO: Revenue Officer
ROFT: Record of Federal Tax
RONT: Record of Net Tax Liability
RP: Revenue Procedure
RPC: Return Preparer Coordinator
RR: Revenue Ruling
RRA: Restructuring and Reform Act of 1998
RRTA: Railroad Retirement Tax Act
RSED: Refund Statute Expiration Date
RTN: Routing Transit Number
RURT: Railroad Unemployment Repayment Tax
RWNS: Resource Workload Management System
SA: Special Agent
SAC: Special Agent in Charge
SB/SE: Small Business/Self-Employed
SBSE: Small Business & Self Employed
SC: Service Center
SC IS: Service Center Information Systems
SC TAS: Service Center Taxpayer Advocate Service
SCA: Service Center Advice
SCCB: Service Center Collection Branch
SCCF: Service Center Control File
SEP: Special Enforcement Program
SET: Self Employment Tax
SFR: Substitute for Return
SHR: Strategic Human Resources
SIC: Schedule Indicator Code
SP: Strategic Programs
SPB: Special Procedures Branch
SPC: Submission Processing Center
SPEC: Stakeholder Partnership, Education and Communication
SSA: Social Security Administration
SSN: Social Security Number
TA: Taxpayer Advocate
TAM: Technical Advice Memoranda