There are 3 methods to add shipping address, See below
Method 1: While adding new customer
On the dashboard, click on the Customer / Vendor option, then click on the “Add New” button.
A Customer / Vendor Detail page will open — here, fill in all the customer details including the shipping address.
Once saved, this shipping address will be available whenever you create an invoice or shipment for that customer.
Method 2: While creating sale invoice
Step 1: Under the Customer Information section, you’ll see the Shipping Address field, which is checked by default (meaning it uses the same address as the main one).
Step 2: To use a different shipping address or add a new one, simply uncheck that box — this will let you select or enter another shipping address.
Step 3: A small shipping address window will pop up. Fill in the new shipping address details and click Save.
Method 3: By editing existing customer
Step 1: Go to “Customer / vendor” Menu and click on “Add New” button.
Step 2: Scroll down to find the Shipping Address section. Click on the Manage button.
Step 3: A new page will open. Click on the Add New button, fill in the shipping address details, and then click Save to add it.