The TE/GE Deposit Unit at the CSPC performs the initial processing of the determination letter request submitted by the taxpayer.

The cases files are shipped to EP-DCSC to process the determination letter application.

Data Transcription System (DTS) — EP Applications are manually entered. Transmittal sheets, mailing labels and file labels may be generated from the system. (See IRM 7.14.2, Data Entry, IRM 7.14.3, Data Transcription Subsystem and Inventory Control Subsystem Main Menu Options, and IRM 7.14.4,Letter Generation).

Letter Generation System (LGS) — Additional information letters may be generated through the LGS, but final determination letter must be generated through EDS. All letters created on EDS can also be reprinted. (See IRM 7.14.4,Letter Generation).

Inventory Control System (ICS) — Case assignment, status update, closing data, re-sending EDS and MPS unpostable information, and research capabilities are available from this option on EDS. (See IRM 7.14.3,Data Transcription Subsystem and Inventory Control Subsystem Main Menu Options, and IRM 7.14.5,Inventory Control System).

Management Information System (MIS) — Inventory and employee reports are available. (See IRM 7.14.6,Management Information System (MIS)).

Time Reporting System (TRS) — is not available at this time.

File Maintenance System (FMS) — Control files are updated for operating EDS. These control files, for example, are the Employee Plans Master File and System Parameter files for DTS and LGS. Instructions for the use of these files are found in the File Maintenance Manual. This manual has been distributed to select individuals who administer EDS. See your EDS Functional Coordinator or System Administrator.

Master File Pipeline System (MPS) — Receives and validates the EDS data in the service center before it transfers the data to the EPMF and Detroit Computing Center. (See IRM 7.13.6, Inventory Control Subsystem, for a complete description of MPS and correcting unpostables.)

Alphanumeric — Allows entry of all characters on the keyboard. Lowercase characters (a–z) when entered on a screen, are added to the database in uppercase except where noted.

Numeric — Allows entry of only digits 0 through 9. Leading zeros can normally be omitted except where noted.

Alphabetic — Allows entry of only letters A–Z and blank spaces.

Decimal — Allows entry of only digits 0 through 9. Leading zeros and zeros trailing a decimal point can be omitted.

Left Arrow — Moves the cursor to the beginning of the current field. If the cursor is already at the beginning, the cursor is moved to the beginning of the preceding field.

Right Arrow — Moves the cursor one position to the right. If the cursor is already at the last position of the current field, the cursor is moved to the beginning of the next field.

Up Arrow — Moves the cursor to the first input field of the line immediately above.

Down Arrow — Positions the cursor at the first input field following the current line.

Backspace — Moves the cursor one position to the left.

Home — Positions the cursor at the first input field on the screen.

Tab — Moves the cursor to the next field.

Return/Enter — Same as Tab, above.

Del/Delete — Erases all characters on the current field from the cursor to the end of the field and replaces them with underlines.

Esc/Escape — Turns off the insert mode of the F9 key. See F9, below.

F1 — Execute key. Indicates completion of input for the current screen.

F2 through F6 — Function varies depending on the EDS option in use. Use will be indicated by the system itself. Most common uses are:

F7 — Redraw key. Redraws the current screen on the terminal to clear system messages, mail messages, or transmission problems displayed in the middle of a screen.

F8 — Delete key. Deletes a character at the current cursor position.

F9 — Insert key. This key may only be used on alpha or alphanumeric fields. Subsequent characters entered will be inserted before the cursor. To turn off the insert mode, press the Esc key. The insert mode is automatically turned off at the end of a field.

F10 — Cancel/Exit key. In DTS the F10 key will cause all data entered for the current transaction to be deleted. All other times the F10 key exits a screen and returns to the previous menu.

F11 — Print key. Prints the information displayed on the screen. The system will prompt for the printer number/method (1–9, s, t or n) to print the screen image.

The System displays a screen.

The user enters the responses to the screen prompts in the input fields.

The arrow and other keys can be used to skip over fields.

The same keys should be used when an input field is not completely filled, so that the cursor is positioned in the next input field.

The F1 key (or other key if so indicated) is depressed when all required data fields have been entered.

The system will display "WAIT" at the bottom right corner of the screen to indicate that it is processing the data entered and that no key should be hit until the "WAIT" sign is turned off.

The system performs edit and consistency checks to ensure that the data entered is correct.

If an error is detected, the terminal will beep, an error message is displayed (some messages may be in reverse video) on the last line of the screen, and the cursor is positioned at the field in error. Enter the correct data and depress the F1 key.

Repeat the above error correction procedure until all errors have been corrected. The next screen, if any, will then be displayed.