Step 1: How to create new supplier in SAP MM module?

 Create Vendor Master Data T-code XK01

The supplier master data contain three views

• Client Level: Address of the vendor, vendor number, preferred communication
• Company Code Data: Reconciliation account, terms of payment, bank account
• Purchase Org Data: Purchasing currency, salesman's name, vendor partners

so that's means suppliers are established in both accounting and purchasing. 

To create a new supplier, follow the menu path:

Logistics ➤ Material Management ➤ Purchasing ➤ Master Data ➤ Vendor ➤ Central ➤ Create

or you can use the transaction code: Create: XK01

In the Create Bussiness Partner screen choose Organization. Now press Enter or click on Continue.

In the Create Organization: Role FI Vendor screen in the tab Address enter

Title: Company

Name: Mid-West-Supply your name and SAP ID

Search term: ###(Last 3 digit of SAP id)

Street: 335 W Industrial Lake Dr

Postal Code: 68528

City: Lincoln

Country: US

Region: NE

Communication Language: English

now press Enter  and click on Vendor : Tax Data

In the Additional Tax Data section enter 12-3456### as Tax Number (remember to replace ### with your number). Confirm your entry and click on the bottom 
(left side of More option i.e top right side of your screen) 

Company code: US00  and press Enter

In the tab Vendor: Account Management sereen

Reconcilation acct: 300000 and click Enter

Switch to the tab Vendor: Payment Transactions

Payment terms: 0001 and select Check Double Invoice

Switch to the tab Vendor: Correspondence 

Clerk at vendor: Your name

In the drop down menu Create in BP role choose Vendor.

In the Popup Change to another BP role in create mode click on Save 

Now one business partner number will be generated, please note it down.

To expand your purchase data information of your newly created partner Mid-West Supply click on Purchasing

In the Purchasing Organization area enter US00 as Purch. organization. Then click on Enter.

In the tab Purchasing Data enter USD as Order currency and enter 0001 as Payment terms.

Navigate to the tab Partner Functions and enter VN for the slot PF. Press Enter.

Click on to save your vendor master record. The system will automatically assign a unique number for your vendor.

Click on the exit icon to return to the SAP Easy Access screen.

To complect the Step 2: Create Material Master for Trading Goods Click here