I am trying to upload expenses in pdf format, actual invoices, and it's only letting me see pictures on my phone. How do I upload receipts?

I'd be glad to help you upload receipts in QuickBooks Online, @michael-size-weg.

You can enter, attach, and track expense receipts and bills you capture with your phone or email to QuickBooks. It also supports PDFs and jpeg, jpg, gif, or png image formats.

Here's how: 

1. Open a web browser, then sign in to QuickBooks Online.
2. From the left menu, choose Banking.
3. Go to the Receipts tab.
4. Drag and drop the receipt or bill file directly into QuickBooks Online. Or select Browse to upload them. 

If you're using a mobile device to add receipts and bills, here's how: 

1. Install the QuickBooks Online app.
2. Open the app, then tap the Menu ≡.
3. Select Receipt snap.
4. Choose the Receipt Camera and snap a photo of your receipt. 
5. Select Use this photo, then tap Done.

For future reference, consider checking out this article: Email receipts and bills to QuickBooks Online. 

Please click the Reply button if you need further assistance in uploading receipts in QBO. I'll be around to help you. Keep safe and stay healthy.