Thanks so much for your reply @ReneeM7122 . So it is correct to receive a 1099-NEC for work done outside the US, in a foreign country, while a US citizen. Unfortunately it seems that TurboTax doesn't have an option to declare 1099-NEC as foreign income. I called the TurboTax helpline directly and they told me that the money is not foreign income if it was from a US company, which I don't think is correct.
