1031 exchange and tax filing question

[Scott Esmail]

I have bought and sold a few properties in 2016, I am a bit late on filling so I am looking for answers on the 1031 exchange only 1 of the properties may meet the guidelines. My question is  there some forms  I needed to fill out with IRS before when the sale and purchase of the properties were being done ?or is the all the paper work to just be done at the end of that fiscal year.? Also I am looking for someone to file my  taxes for 2016. I am Canadian and my Canadian account has finished the financial statements  and ready for a US account to file.