One has to file the form 1040-NR if the person is living outside of the US and is a non-resident alien of the US. A non-resident business in the US during the tax year. Even those who have to represent a deceased can also file this form. If you have received gifts or distribution or owe special taxes or have net earnings from being self-employed.
To apply for an extension request the expat has to fill the IRS Form 4868 to send in your extension request by mail. The taxpayer must file for an extension online free of cost with the IRS partners or make a payment on the IRS website that covers all or estimated part of your tax bill, it will automatically process an extension for your tax return.
No, the form 1040-NR cannot be e-filed. It has to be completed, signed, and submitted by the mail to address on the form.
Those non-resident aliens who are citizens of the US but live abroad have to file this form as the worldwide income earned by the US citizen is subjected to IRS according to the US tax laws.
The IRS will formally send a notice if you do not pay your taxes. Any discrepancy found in the failure of filing a tax return will lead to penalty and deliberate avoidance or filing a fraudulent tax return will be subject to criminal prosecution under the US laws.
No, filing a request for extension will only extend the time to file a tax return in case the taxpayer does not have the required documents for filing a return. However, getting an extension does not extend the time or the deadline to pay taxes. If at all, the taxpayer delays paying the taxes, they will be charged with interest that will be accurate from the given deadline.