The Internal Revenue Service recently announced statistical information regarding the 2016 tax season that you may find interesting:

The IRS received 135.6 million tax returns through April 21st.  They issued 97 million refunds worth $268.3 billion, with the average refund being $2,763.  Taxpayers filed 11.6 million extensions which is up by .9 percent from previous year.  

As a reminder from the IRS - “An extension form filed by the deadline allows a taxpayer to hold off on filing the actual tax return for six months, although any tax due must have been paid by the April 18 deadline to avoid interest and penalties”.  (2017, April 25) - IRS Sees Millions of Tax Returns Last Days of Tax Filing Season.  Retrieved from www.irs.gov