What happened to pdf invoice on the emailed invoice?

Hi mike369, 

Welcome to the Community. QuickBooks is a hassle-free program that enables you to get your work done faster. I can see the importance of being able to attach a PDF to your customer's invoice. I'll be happy to give you a hand so you're on the right track with your work. 

I encourage you to check your invoice settings to make sure you're able to attach invoices, here's how: 

1. Navigate to Settings ⚙, then click on Account and Settings.
2. Go to Sales, then Online Delivery.
3. Mark the PDF attached box.
4. Hit Save then Done.

Going forward, the PDFs will be attached to the invoices you email out to your customers. Let me know if this info helps by marking this as solved or by leaving a comment below. I'll be here in case you have questions.