Filing by the deadline is essential and can save you money. The IRS charges interest for any balance left unpaid after the deadline, so if you miss the deadline not only will you be paying late fees, but you will also be paying extra interest. Filing by April is always a smart choice (or June in 2020), but if you are struggling to gather your information on time, you can estimate a payment to the IRS and reduce overall interest until it is fully paid. Please note most expats do not owe U.S. taxes. If you want peace of mind and are in need of tax assistance, get in touch with Expatriate Tax Returns.