IRMs - Internal Revenue Manuals
The IRM is the source of instructions to IRS staff, and includes policies, delegated authorities, procedures, instructions, and guidelines related to the operation of the Service. 
DT IRMs
IRM Part Chapter Section Description
25.6.1 25 - Special Topics 6 - Statute of Limitations 25.1 - Estate and Gift Tax Examinations

Statute of Limitations Processes and Procedures

3.11.106 3 - Submission Processing 11 - Returns and Documents Analysis 11.106 - Estate and Gift Tax Returns

Processing Estate and Gift Tax Returns

3.11.106.108 3 - Submission Processing 11 - Returns and Documents Analysis 11.106 - Estate and Gift Tax Returns

Processing Forms 4768 and Section 6163 and 6166 Elections

4 4 - Examining Process

Examining Process Index, IRM 4.1 - 4.119 (Includes Estate Tax IRMs 4.25.1 - 4.25.14

4.25.1 4 - Examining Process 25 - Estate and Gift Tax

Estate and Gift Tax Examinations

4.25.10 4 - Examining Process 25 - Estate and Gift Tax 25.10 - Estate and Gift Tax Case Closing Procedures

Estate and Gift Tax Case Closing Procedures

4.25.11 4 - Examining Process 25 - Estate and Gift Tax 25.11 - Estate and Gift Tax Special Examination Procedures

Estate and Gift Tax Special Examination Procedures

4.25.12 4 - Examining Process 25 - Estate and Gift Tax 25.12 - Estate and Gift Tax Valuation Assistance

Estate and Gift Tax Valuation Assistance

4.25.13 4 - Examining Process 25 - Estate and Gift Tax 25.13 - Estate and Gift Tax Appeals, Mediation, and Settlement Procedures

Estate and Gift Tax Appeals, Mediation, and Settlement Procedures

4.25.14 4 - Examining Process 25 - Estate and Gift Tax 25.14 - Estate and Gift Tax Miscellaneous Procedures

Estate and Gift Tax Miscellaneous Procedures

4.25.2 4 - Examining Process 25 - Estate and Gift Tax 25.2 - Campus Procedures for Estate Tax

Campus Procedures for Estate Tax

4.25.3 4 - Examining Process 25 - Estate and Gift Tax 25.3 - Estate and Gift Tax Planning, Classification, and Selection

 Estate and Gift Tax Planning, Classification, and Selection

4.25.4 4 - Examining Process 25 - Estate and Gift Tax 25.4 - International Estate and Gift Tax Examinations

International Estate and Gift Tax Examinations

4.25.5 4 - Examining Process 25 - Estate and Gift Tax 25.5 - Technical Guidelines for Estate and Gift Tax Issues

Technical Guidelines for Estate and Gift Tax Issues

4.25.6 4 - Examining Process 25 - Estate and Gift Tax 25.6 - Report Writing Guide for Estate and Gift Tax Examinations

Report Writing Guide for Estate and Gift Tax Examinations

4.25.7 4 - Examining Process 25 - Estate and Gift Tax 25.7 - Estate and Gift Tax Penalty and Fraud Procedures

Estate and Gift Tax Penalty and Fraud Procedures

4.25.8 4 - Examining Process 25 - Estate and Gift Tax 25.8 - Estate and Gift Tax Delinquent Returns and SFR Procedures

Estate and Gift Tax Delinquent Returns and SFR Procedures

4.25.9 4 - Examining Process 25 - Estate and Gift Tax 25.9 - Requests for Abatement, Claims for Refund, and Doubt as to Liability in Estate and Gift Tax Cases

Requests for Abatement, Claims for Refund, and Doubt as to Liability in Estate and Gift Tax Cases

5.5.6 5 - Collecting Process 5 - Decedent Estates and Estate Taxes

Collection on Accounts with Special Estate Tax Elections

8.7.4 8 - Appeals 7 - Technical and Procedural Guidelines 25.4 - International Estate and Gift Tax Examinations

Appeals Estate and Gift Tax Cases

Copyrights Section 6166