define([
    "jquery",
    "ko",
    "uiComponent",
    "Magento_Customer/js/customer-data"
], function ($, ko, Component, customerData) {
    var self = {
        initialize: function () {
            this._super();
            var checkoutData = customerData.get('checkout-data')();
            checkoutData.shippingAddressFromData = {
                firstname: 'your firstname',
                lastname: 'your lastname',
                company: 'your company',
                street: { 0: 'street line 1', 1: 'street line 2' },
                city: 'your city',
                postcode: 'your postcode',
                region: 'region name',
                region_id: 'region ID of dropdown',
                country_id: 'US',
                fax: '1112223333',
                telephone: '4445556666'
            };
            customerData.set('checkout-data', checkoutData);
        }
    };
    return Component.extend(self);
});