On a daily basis, an end user needs to access the T-code to perform daily transactions. All the T-code is entered in a command field. A command field is a space designed by SAP for entering T-codes. There are multiple ways to enter a T-code; we will gradually learn about the different approaches.
The first approach is to enter the T-code in the command field, as shown in the following screenshot:

Second, the T-codes can be accessed via SAP Easy Access. By double-clicking on a node, the associated application is called and the start of application message is populated at the bottom of the screen. SAP Easy Access is the first screen you see when you log on. The following screenshot shows the SAP Easy Access window:

Tip
We don't have to remember any T-codes. SAP has given a functionality to store the T-codes by adding it under Favorites.
To add a T-code to Favorites, navigate to Favorites | Insert transaction, as shown in the following screenshot, or simply press Ctrl + Shift + F4 and then enter the T-code that we wish to add as favorite:

There are different ways to call a technical screen using a T-code. They are shown in the following table:
Let's look closely at the important or frequently used T-codes for administration or transactional purposes.
The following are the essential T-codes in the Recruitment submodule:
After PBA8
T-code is executed, we will see a message similar to the one shown in the following screenshot:

We will cover some of the important T-codes used to design and develop the organization structure in the following table:
The Personnel Administration submodule deals with everything related to the master data of employees. Some of the frequently used T-codes are listed as follows:
The usage of the PA70
T-code is shown in the following screenshot. Multiple employees can be entered, and the corresponding wage type, amount, currency, and so on can be provided for these employees. Using this functionality saves the administrator's time.

The Time Management submodule is used to capture the time an employee has spent at their work place or make a note of their absenteeism. The important T-codes that maintain time data are covered in the following table:
The gross and net calculations of wages are performed using this submodule. We will cover all the important T-codes that are used on a daily basis in the following table:
Tip
The "XX" part in PCXX denotes the country grouping. For example, its 10
for USA, 01
for Germany, and so on. SAP has localized country-specific payroll solution, and hence, each country has a specific number. The country-specific settings are enabled using MOLGA, which is a technical name for the country, and it needs to be activated. It is the foundation of the SAP HCM solution.
It's always 99
for Offcyle run for any country grouping. It's the same for posting as well.
The following screenshot shows the output of the PC_Payresult
T-code:

The Talent Management module deals with assessing the performance of the employees, such as feedback from supervisors, peers, and so on. We will explore all the T-codes used in this submodule. They are described in the following table:
The Training and Event Management submodule caters to the company's need of bridging the gap between supply and demand. This submodule caters to identifying the right skill that needs to be provided to carry out the task successfully. Let's take a look at the important T-codes and their functionalities in the following table:
The Travel Management submodule offers functionalities such as creating different travel expense types, processing business trip data, taking care of approvals, and entering the travel trip data into the system. Let's focus on the important T-codes related to this submodule, shown in the following table: