Your question is very thin on details. You will have a greater success of experts answering if you share a bit more about what you're looking to learn.

You need to implement a document management system like hubdoc which can save all the vendor invoices directly into its system and then you can find all the invoices at one place.
See this.
https://www.hubdoc.com/how-it-works.

Get in touch at hello@meruaccounting.com we shall be glad to answer your specific questions free of cost.

We are a Firm of chartered accountants that specialize in bookkeeping for clients globally.

Cheers
Rushabh