He found I missed a few large deductions, and he can file amended returns.That's a while back, and I used CPAs since.

You can file an amended return for that.

If I'm working with my leases, I do an amendment to the lease addressing any changes including new rent, who pays utilities, additional fees, etc. 

Here’s what to know.State Equalized Value versus Taxable ValueBack in 1994 Michigan passed the Headlee Amendment:(http://www.legislature.mi.gov/(S(k5m2va1uyfgwtbyjf4nqb1bx))/mileg.aspx?

These guidelines are typically outlined in the community's governing documents, including the Declaration of Covenants, Conditions, and Restrictions (CC&Rs), bylaws, and any amendments or resolutions that have been adopted over time.

But from what I've seen MD may go the way of AZ and some other states:https://azre.gov/news/arizonas-new-wholesaling-disclosure-re...I've seen the proposed amendments to current MD law and to me the proposed framework to protect the public makes more sense than trying to require people get licensed just so they can engage in conduct that you suggest the state considers illegal to begin with.

Amend numbers accordingly, but I will say, typically, if your goal is scaling and growing your net worth and deal size, you can't be buying turnkey rentals (if you are).  

@Rob K. response seems very good, but I want to add that one of the two proposed prop 13 amendment initiatives (prop 19) eliminates the Prop 13 tax bases transferring to children and grandchildren if the unit is not the primary residence (I.e. rentals and vacation/second homes).  

I hope for your sake -- and the sake of a lot of my clients -- that this gets amended well. 

Our firm likes to take it a step further and if we see mistakes amend those so you can get tax refund back from prior years.