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
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