Tax Due Dates in 2018
IRS E-file begins
W-2 due from employers
“Tax Day” Deadline day for filing federal and state (most states) income tax returns and extension requests. Additional days due to holidays.
FBAR reports due to US Treasury
“Tax Day” for US expats. Deadline for filing federal and state income tax returns (most states) and extension requests
Filing extended 2017 federal and state income returns. Note: you still need to file for an extension request by April 17, or June 15th for expats. Any expected tax liability still due by April 17 without interest and penalties add-on.
October 16 (extended)
FBAR is DUE.
April 15, 2021
Last date to file a 2017 tax amendment is in 2021.
Deadline of 3 years from the original due date to claim any tax refund of any previous years.
See full schedule at this link here, especially for businesses.