Internal Revenue Service
Publication 1346
Electronic Return File Specifications
for Individual Income Tax Returns
Tax Year 2009
PART 1 – File Specification
PART 2 – Record Layouts
PART 3 – Electronic Transmitted Documents
IRS
Department of the Treasury
Internal Revenue Service
www.irs.gov
Publication 1346 (9-2009)
Catalog Number 64403B
TABLE OF CONTENTS
Introduction......................................................... ix
Highlights............................................................ 1
Section 1 - Data Communications............................................ 5
.01 IRS Front-End Processing Subsystem (FEPS) ....................... 6
1. File Transfer Protocols Character Code & File Compression.... 6
2. Trading Partner/Transmitter Interface (TPI).................. 6
3. Transmitter Profile Data Base (TPDB)......................... 6
4. Asynchronous Communications Transmitter Interface............ 7
5. Examples..................................................... 7
6. Suspended Transmitter........................................ 7
7. Virus Detection Procedures................................... 7
8. Logon Validation Specifications.............................. 8
a. Transmission Inactivity .................................. 8
b. Changing File Transfer Protocol Indicator (FTP) .......... 8
c. Changing File Compression ................................ 8
9. IMF Trading Partner (1040 and ETD) Session Example .......... 8
a. Successful Login – No Password Change Required ........... 9
b. Successful Login Password Change Required ................ 9
c. Unsuccessful Logon ....................................... 9
d. Registration of Shared Secrets........................... 10
e. Changing Password ....................................... 13
f. Re-Enabling Account Using Shared Secrets ................ 15
g. EMS Una