Gsyfuy

I am using Magento 2.0.7 and my default billing and shipping address are different in My account Address section.

When I am going on checkout page my default shipping address selected by default and I move on payment section but on payment section My shipping address by default set as billing address.

I already mention default billing address then how we get that address selected by default ?

You could do the following:

• overwrite a default js file checkout-data-resolver.js


• add extra lines to the applyBillingAddress function to check if default
  billing address exists and if true to use it

step 1. Overwritting a default magento checkout-data-resolver.js

• 1.1 Create your module. YourCompanyCheckout




• 1.2 Add file appcodeYourCompanyCheckoutviewfrontendrequirejs-config.js

with following content

var config = {

map: {

    '*': {

        'Magento_Checkout/js/model/checkout-data-resolver': 

    'YourCompany_Checkout/js/model/checkout-data-resolver'        

    }

}



};

• 1.3 Copy magento file vendormagentomodule-checkoutviewfrontendwebjsmodelcheckout-data-resolver.js
  to the destination
  appcodeYourCompanyCheckoutviewfrontendwebjsmodelcheckout-data-resolver.js

step 2. Modify applyBillingAddress function

2.1 in new checkout-data-resolver.js file find applyBillingAddress. Insert following cod after var shippingAddress; and before if (quote.billingAddress())

....

var isBillingAddressInitialized;

isBillingAddressInitialized = addressList.some(function (addressFromList) {

  if (addressFromList.isDefaultBilling()) {

     selectBillingAddress(addressFromList);

              return true;

    }



  return false;

 });



if(isBillingAddressInitialized){

                 return;

             }  

....

This code actually goes through customer addresses and checks if any of them has defaultBilling set to true. If such an address exists it will be used as the billing address. If not the script will fall back to the default magento behavior

I got solution of this problem.
please check your theme override file:

/app/design/frontend/Vendor/your-theme/Magento_Checkout/web/js/view/shipping.js

in this file checkout your custom code on line no 114 or may be change of this line your file. So, checkout this function

initialize: function ()

Inside this function check following code

 registry.async('checkoutProvider')(function (checkoutProvider) {

       //////////

          Your Code 

      /////////    

 });

from this jQuery remove your custom code or update with new code.

hope it will work for you. In my case it is working for me after update this function.

Thanks