Systems & IDRS Command Codes

The Integrated Data Retrieval System (IDRS) enables IRS representatives to access tax records, research account modules, and process adjustments.

Core Command Codes (CC)

Command Code	Name	Primary Use
TXMOD	Tax Module Display	Comprehensive transaction history for a specific TIN, MFT, and Tax Period. Shows all TCs, dates, amounts, and freeze conditions.
SUMRY	Account Summary	High-level summary of all tax years and MFTs for a TIN showing account balances and statuses.
ENMOD	Entity Module Display	Name, address, marital status, filing history, birth/death indicators, and entity freeze codes.
NAMES	Name Directory Search	Searches TIN by taxpayer name and address when SSN/EIN is unknown or disputed.
MREF	Money Reference	Researches unapplied, misapplied, or unidentified payments.
CFINK	Centralized Authorization File (CAF) Check	Checks whether a third party has a valid Form 2848 (POA) or Form 8821 on file.
BMFOL	Business Master File On-Line	Research tool for business entity tax accounts.
IMFOL	Individual Master File On-Line	Researches individual account master files, wage transcripts, and return summaries.

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Navigating TXMOD Screens

A standard TXMOD request takes the format:

TXMOD <TIN> <MFT> <TAX-PERIOD>
Example:
TXMOD 000-00-0000 30 202412

Key Screen Sections:

1. Header: TIN, MFT, Tax Period, Name Control, Filing Status, Cycle Date.
2. Current Balance: Assessed tax, accrued interest, failure to file/pay penalties.
3. Freeze Conditions: Left-hand flags for -V, -Z, -R, etc.
4. Transaction Section:
   • TC: 3-digit transaction code.
   • TRANS-DATE: Posting date.
   • AMOUNT: Debit (increases balance) or Credit (reduces balance).
   • REF-INFO / AC: Reference numbers, Action Codes, or Document Locator Numbers (DLN).