I wanted a cohesive, fairly upscale look, so bought new from a variety of places including a local furniture store, Amazon, Wayfair, Target online, Home Depot online, Pottery Barn, Article, and others.

I have corporate bookkeeping experience and can see all the money coming in online but there is no one there I can speak with about our account.

Find ways to consistently and systematically add more people to your database each week - i.e. cold calling, networking, online marketing4.

I could not find any details that confirm that online. 

My company sends our listings out to many different platforms, but now does not use Craigslist or Facebook.The majority of inquiries for me come from the Zillow family of sites and rentals.com affiliated sites, as well as our robust internal database. 

Then just yesterday, I come across the 1099 / 1099-NEC form requirements online from my own research.

You'll need good contact info for them to be able to collect, and ideally the new address for the tenant however which if you don't have can probably be found easily with some online sleuthing/ contacting their employer, skip tracing software, etc. 

Jackie has a good point that much of it is free on line.

A specific property you find online would be even better.

Each town is a little different, some require you to do a landlord registration and/or will want to do an inspection before you put a tenant in (calling the town would probably be the easiest, or they may have the info right online).