In QuickBooks Desktop (QBDT), you can customize your invoices by adding more columns to include additional fields. I'll guide you through the process below.

 Here is how to add custom columns to your invoices in QuickBooks Desktop: 
 

1. Firstly, In your QBDT, go to the menu bar and click on Lists.
2. Then choose Templates.
   
   

    

3. In the Templates list, find the invoice template you want to customize.
4. Right-click on the invoice template and select Edit Template.
   
   

    

5. From the Basic Customization window, click on the Additional Customization button at the bottom.
6. From the Additional Customization window, go to the Columns tab.
   
   

    

7. In this section, you will see the existing columns such as Item, Description, Qty, Rate, Amount, and any custom fields like Other 1 and Other 2.
8. To add custom fields in invoice columns, click on the Item section or any section where you would like to add columns, then look for the Custom Fields. 

You can create up to 7 custom fields in QuickBooks Desktop Pro and Premier (and more in Enterprise) To start:
 

1. Enter the names of the custom fields you need, such as Custom Field 1 and Custom Field 2.
2. Check the boxes to make these fields available on Transactions, Customers, Vendors, Employees, or any combination as needed.
   
   
3. Click OK after defining these fields:  

• After defining the custom fields, you should see them listed in the Columns section of the Additional Customization window.
• Check the box next to each custom field to make it appear as a column on your invoice.
• You can also specify whether to print the column (to show it on the customer-facing invoice) and/or show it on the screen.
  
  

Moreover, please take note of the following tips to help you set everything up in order:
 

1. You can use the Position column to arrange them in the order you prefer on the invoice screen and printed forms.
2. Use the up and down arrows or drag and drop to change their positions.
3. Once you have added the necessary custom fields and arranged them as desired, click OK to save your changes in each window until you exit the customization screens.

Lastly, verify all invoices:
 

• Go to create or edit an invoice to verify that the custom columns are showing as expected.
• Ensure the information entered in these custom fields is presented correctly.
  
  

For general data fields, you can create custom fields to capture specific customer, vendor, employee, product, and service details.

When a customer settles an invoice, it is essential to record the payment in QuickBooks. Documenting invoices in QuickBooks helps maintain accurate financial records.

Our team and I are always here to assist with any further questions about integrating columns.  Please reach out whenever you require assistance.