When is IRS form 8824 due to be filed?
For example if I sell a property in Jan 2017 and get an extension to file my federal taxes for 2017 till October 15, 2018 then do I need to file my form 8824 along with my IRS federal tax return in October 2018 or or am I required to file this form 8824 before Oct, 15, 2018?