Checkout page when we get No delivery methods available for this address warning
Solution:
Create a new customer record
List->Relationships->customer fill out the name ,subsidiary (choose headquarters)and go to the access sub tab enable the give access in assigned website give the name , enable manually assign or change password and give the password.
Click on save
To select subsidiary
Go to the web list Commerce->Website->Website list-> setup sub tab click the subsidiary which was given while creating customer record
Click on save
To enable the feature
Setup> Company> Enable Features Click on Transactions In shipping and Receiving sub tab enable the SHIPPING LEVEL INTEGRATION box.
Click on save.
To Check new shipping item
List > Accounting> Shipping items ->new give the ship name ,display code in Shipping Rate sub tab Accounts(shipping) select 8030 shipping income in , give flat rate
In shipping rules sub tab fill the LIMIT TO SITES , COUNTRIES , STATES CHARGE TAX ON THIS SHIPPING PORTION OF ITEM click Save

To enable shipping item on the webstore
Navigate to Lists > Accounting > Shipping Items
Click Edit any shipping item
Ensure that the Display in Web Site is checked
If the Display in Web Site box is not present on the record, the Charge for Shipping option may not enabled. To enable it
Navigate to Setup > Accounting > Shipping
Enable Charge for Shipping
Click Submit
Go back to the Shipping Item and the Display in Web Site and other options such as Shipping rate, etc. will be displayed
Navigate to Commerce->website->website list->shopping sub tab
enable PROCESS AN ONLINE PAYMENT WITH SALES ORDER CREATION
In DEFAULT WEBSITE SHIPPING METHOD select the created shipping item
Click on save