Can I customize the columns in the Customer list?

I'm here to share insight regarding customizing your Online (QBO) account so it will display the mobile numbers of your customers, @KurtzJD. 

You can add a mobile number to your customer's profile. However, displaying this on your Customer page isn't possible. Only the phone number column will be visible on this page. 

As a workaround, you can create a custom field that contains this information and you may name it as "Mobile number", which will then appear on your customer list page. To add one, you'll need to subscribe to QBO Advance.

After creating a custom field, you can follow these steps to view this on your page:

1. Go to Customer & leads. 
2. Select Customers.
3. Click the Gear icon beside the Export icon.
4. Find the Mobile number checkbox, then tick it. 

Once you’ve done this, the program will recognize it and set it as the default.

Alternatively, you can also utilize the Customer Contact List report which contains your customers’ details and information. The Phone column of this report will include both their phone and mobile numbers.

Additionally, you can check out this article if you want to process customer-based payments: Record invoice payments in QuickBooks Online.

I'll be sure to get back to you if you have further questions about customizing the columns of your customer list. Just tag me if you have one.