how do I apply a deposit paid to a Vendor on the Vendors final invoice

Hi Hollyhead,

Thanks for reaching out to us here. Making sure you're recording your transactions properly is an essential step for maintaining clean books. QuickBooks is a powerful program that enables you to enter your transactions without any hassle. 

Based on the details you've provided, I recommend reaching out to an accounting professional for expert advice on this. If you're not in contact with a professional, don't worry, you can search for one using this link here. Doing this helps prevent errors in your books. 

Give this a try and feel free to ask other questions, I've got your back.