I recognize the importance of having the old invoice templates and creating a new one using QuickBooks Desktop (QBDT). Let's work together to find those old invoices in QBDT.

First, let's track down your old invoice templates by following the steps below. Here's how:

1. Go to Lists, then click Templates.
   
   
2. A new window will pop up where you can find your old invoice templates.
3. If you wish to create a new one, hit the dropdown arrow beside the Templates.
   
   
4. Select New and choose Invoice, then OK.
   
   
5. Customize everything according to your preference.
6. You can also change the font of your Title, Company Name, Company Address, and Labels by clicking the Change Font button.
7. Once done, hit OK.

If you can't still find your old invoice template, or change the font on your invoice, let's use the Verify and Rebuild Data tools. This helps resolve common issues in your company file that can prevent you from finding your old invoice templates in QuickBooks Desktop (QBDT). I recommended running it three times to enhance data integrity.

Before we proceed, ensure to create a backup copy of your company file to prevent potential losses due to unforeseen circumstances.

To verify, here's how:

1. Proceed to the Window tab, then Close All. 
2. Click on File and select Utilities.
3. Choose Verify Data. Hit OK. 

Next, follow these steps to rebuild your company data:

1. Go to the File menu, then choose Utilities.
2. Select Rebuild Data. QuickBooks will prompt you to do a backup before rebuilding your company file. Pick OK.
3. Save your backup, and OK. 
4. When the Rebuild has completed message appears, hit OK. 

Moreover, I'm adding this article as your reference in recording invoice payments using QBDT: Record an invoice payment.

I welcome you to use the Reply button for additional questions or concerns about your invoice templates in QBDT. I'll be here to lend a hand and ensure a satisfying experience with our software. Together, we can achieve great things for your business!