2015 Document 6209 is a reference guide which contains ADP and IDRS data relative to various components of the IRS. It is updated annually.
Section 2, Tax Returns and Forms (PDF)
Section 3, Tax Return Information (PDF)
Section 4, Document Locator Number (PDF)
Section 5, Debtor Master File (PDF)
Section 6, Initiating and Monitoring Refund Check Tracing Action (PDF)
Section 7, Automated Non-Master File (PDF)
Section 8A, Master File Codes (PDF) - Transaction, MF and IDRS Collection Status, Freeze and IDRS Status 48, Restrictive and Filing Requirement
Section 8B, Master File Codes (PDF) - Unpostable and Resequence
Section 8C, Master File Codes (PDF) - Source, Reason, Hold, Priority, Item Adjustment & Credit Reference, NMF Abstract, Underreporter Process, No Merge Reason, EP Merge Fail Reason, TC 971 Action, Master File, and IDRS Location
Section 9, Notices and Notice Codes (PDF)
Section 10, Penalty and Interest Provisions (PDF)
Section 13, Appeals and TE/GE (PDF)
Section 14, Integrated Data Retrieval System (IDRS) (PDF)
Section, 15, Other Systems CADE, CADE2, SCRIPTS, CFOL and FTD (PDF)