Hi there, @OEO.

I'm addressing your question about adding a third ship to address to your transactions and reports in QuickBooks Desktop (QBDT).

Since the field is a customized column, the address added from the customer's setup won't automatically sync. However, we can manually enter the third address on the field from the customer's profile. This way, it will automatically appear when creating transactions under that customer. Given that you have already added the custom field, I'll walk you through how we can enter the address in the field:

1. Go to the Customers menu and select Customer Center.
2. Select a customer for whom you need to indicate a third address.
3. Navigate to the Additional Info tab and enter the address in the customized field.
4. Click OK to save changes. You can repeat the process for every customer you need to add this.

Once done, add this to your template to prevent you from adding the field to every transaction. Here's how:

1. Go to the Lists menu and select Templates.
2. You can add a New one from the Templates dropdown or edit an existing one.
3. From there, click the Add Customization button.
4. In the Header tab, mark check the customized column for Screen and Print to make them visible in your reports and when printing them out.
5. Click OK to finish the process.

Note that recent changes or customizations won't retroactively apply to your transactions. Hence, you must manually enter the address in the respective field for it to appear on your reports. I also recommend reviewing the steps shared by my colleague above to learn about customizing your reports and adding this field.

Furthermore, you can refer to this article about exporting reports in the application: Export reports as Excel workbooks in QuickBooks Desktop.

You're always welcome to post a reply if you need additional help with adding addresses or customizing the details on your transactions, @OEO. The Community is available 24/7 to guide you. Take care!