You can upload a picture either in the attachment section of the invoice or on the attachment page, @superglassni.
First off, please note that you can only upload up to 20 MB file size of the image. The supported file types for attachments are:
- PDF
- JPEG
- PNG
- DOC
- XLSX
- CSV
- TIFF
- GIF
- XML
Follow these steps to attach a picture:
- Go to the +New icon and select Invoice.
- Enter the needed information.
- At the bottom left of the page, select Attachments.
- Browse and select the picture you want to attach, then click to open.
- Select to Save and Close.

Alternatively, you can upload the picture directly from the attachment page:
- Go to Settings and select Attachments.
- Click Add Attachment, select your picture, then click Open.
- Use the drop-down menu on the uploaded image to Create an Invoice with the attached picture.

If you're referring to adding a picture or logo on the invoice itself, here's how:
- Navigate to Settings and select Custom form styles.
- From the New style dropdown, choose Invoice.
- Go to the Design tab and click on Make logo edits.
- Check the Add a logo box and click the box to browse.
- Find and select your image.
- Click Open and once the upload is complete select Save.
- Then, select Done.

For more detailed information on how to upload, edit, or delete logos, refer to this article: Add, customize, or remove logos on sales forms.
I'll also add this resource to guide you in recording your payment so the invoice is marked as paid: Record invoice payments in QBO.
You can count on the Community team if you have further questions about adding a picture to an invoice.