I've had this situation before and it can work out well when you and the tenant agree to a payment plan, especially when the funds can come out of their account automatically.  

Mathematical errors: If you miscalculated a deduction or credit, an amended return can help correct the error.Filing status change: If you originally filed as single but are now married or qualify as head of household, you can amend your return to update your filing status.Missing or incorrect income: If you missed reporting income or reported an incorrect amount, you can amend your return to get this corrected.Missing deductions or credits: If there was a deduction that you were entitled to, but you forgot to claim it, you can amend your return to include the deduction.How should you amend your tax return?

Or another idea is put a single over queen bunk. 

For context, my rent will just cover my PITI for my primary, nothing more--interest rate is 6.3% on a 300k home (so side question, are other people also just getting PITI covered by rent in North Dallas single-family homes, or am I just bad at this??

@Greg Todrank most banks now offer options to pay bills online:1) Via ACH- You need their bank account & routing numbers to one-time enter in your banks online system.

When I buy homes with tanks I account $10,000.

My wife is actually an account exec for a Development Lender up to $20M and my company lends up to $3M.

It's up to your accountant to confirm with you that enough of the burdens and benefits of ownership have passed.If they agree with you then you would do a 1031 right at the signing of the option(actually it can't be an option. 

Just got word from my accountant about this new legislation.

So it's important to reach out to your accountant to see if you can get a refund.