US Federal Tax return: even if you weren’t physically in the US that year, you still need to fill out a Federal Tax Return as a citizen or resident alien. Forgetting to file a federal tax return can get you into significant tax trouble. US State tax return: If the state your company operates from requires employees to complete a state income tax return, then you’ll also have to complete a state return even if you never set foot in that state. For example, if your employer is based out of California, you’ll still need to submit a California state return even if you were working in Iceland. Form 2555: This form is used to determine your FEIE and gets sent to the IRS. If you’re filing Form 673, you will also complete Form 2555 to record your tax exemption with the IRS. The form will help you calculate your exact foreign housing exclusion or foreign housing deduction, which exempt taxes on expat housing expenses. Qualified taxpayers can receive an exclusion on up to $112,000 worth of income in 2022. Attach Form 2555 to your taxpayer's Form 1040 or 1040-SR to receive the exclusion or deduction. FATCA Form 8938: This form is a statement of your specified foreign assets and should be completed if the total value of all your interest in specified foreign financial assets is greater than the appropriate reporting threshold. Form 1116: This form is a statement claiming your foreign tax credit and should be completed if you are an individual, estate, or trust that paid or accrued foreign taxes to a foreign country or US possession. FinCEN Form 114 or FBAR: This form must be completed by US citizens who have foreign financial accounts that exceed $10,000 USD in value at any point in the calendar year. Tax return in your country of residence: You’ll still need to be compliant with the tax laws of the country you’re residing in, so you’ll have to complete a tax return to report the income you receive while living abroad. Further reading: 4 Ways to Reduce Taxes on Foreign Income for US Citizens Living Abroad