并不需要1040-NR。IRS原文说的是Attach a statement to your return to show the income for the part of the year you are a nonresident. You can use Form 1040NR as the statement… (https://www.irs.gov/individuals/international-taxpayers/taxation-of-dual-status-aliens),所以1040-NR并不是必须的。我是直接写了个statement解释为什么我可以dual-status,NRA与RA期间分别的收入,以及声明treaty的$5000是针对NRA期间的收入的。
既然没有1040-NR也就没有8843
也不需要8833,8833 instructions中包括了这种waiver: That a treaty reduces or modifies the taxation of income derived by an individual from dependent personal services, pensions, annuities, social security, and other public pensions, as well as income derived by artists, athletes, students, trainees, or teachers.