We focus on apartment complexes (200+ units) and commercial office. 

A year from now I would like to partner with my sister on a small apartment complex. 

It would have to be enough to compensate them for relocation expenses, plus something extra to incentivize them to move.Apartment complexes do this all the time when someone wants to tear down the complex and put up a retail center, office building, etc.

Looking to buy some multi family complexes.  

You have picked a good time to get into the biz.There are many great startups in the real estate space, trying to crack the code on the complexity of lending, commercial development, affordable housing, investment management, and the list goes on.The way I see it, there is still a ton of room for improvement.

If you live within the complex and you are stay-home mom, you may want to consider getting your hand dirty and do some fix up yourselves.

If I have equity in 5 yrs, maybe do a 1031 into a larger complex or bunch of SFH/Multi family homes?

While Block is ok for a basic tax return with few complexities, your current situation is far from basic.You're amending three year worth of tax returns, but you've also got a few years worth of depreciation that you CANNOT amend your tax return for at this point.  2008, 2009, 2010 and 2011 can definitely NOT be amended and depending on when you filed your original 2012 return, that may or may not be able to be amended.  

We are multi-family real estate entrepreneurs and just joined BiggerPockets. We wholesale most of the properties we put under contract. We pride ourselves to find deals where there is still a lot of value play for the...

The form is complex and takes time, however a good real estate CPA will be able to complete it for you.You need to find a real estate CPA who is going to walk you through tax issues related to real estate and educate you on the tax law so that you can avoid pitfalls in the future.