TN Visa - Application Documents

Hello - I'm in the process of applying for my second TN visa. The first visa I applied for was 8 years ago, so my memory is a little rusty!

I've been researching what I need online and have come across lists of what documents are required - letter, degrees, resume, etc. However, I remember having to present a document showing that the company earns $XX many dollars a year. I guess to prove that they can afford to pay me a salary?

I did find something online that states that I need this, but can't find it again to save the life of me. The document I used before was a markeing borchure that the company used to promote its services, but happened to state its yearly revenue.

Any advice is appreciated. Thanks!