From Wikipedia, Alabama has the second lowest property taxes behind Hawaii.2.

Plug it all into BNBCalc and share it so others can give you feedback- look at the tax savings via the "short-term loophole" at the bottom and learn how that functions as well as it can be a huge aspect of your investment.

She had no use for it and the taxes were becoming a burden.

What apps should I use for setting up a system to invest in tax deeds?

I think the tax benefits combined with building equity is the goal, cash flow is not a major issue thankfully with our household w2 income.

Since you requested any book recommendations, I wanted to point you towards Tax Free Wealth by Tom Wheelwright. 

If your parent’s currently occupy the home, at death if you move in you can get their property tax basis. 

Definitely discuss w your tax advisor too.  

I overlooked including these details on Schedule E when I initially filed my taxes.Any guidance on these matters would be greatly appreciated.

If its a 2-4 unit you only need 15% down using a True Portfolio program and you have DSCR as a back up that uses the STR rents to qualify and avoid personal tax returns or income.