I forgot to claim standard deductions of $12000 (nonresident alien, for Indian students) on my 2018 1040NR. So I am filing a 1040X. For the incorrectly filed 1040NR I received a $600 refund, but in reality (after correction) I should be getting $2010. So after 1040X, I expect $1410 to be refunded.
However, I saw in the instructions that when filing 1040X as a nonresident alien, I should only fill out the name, address, and ITIN/SSN on page 1, and the reason in part III on page 2.
So, if I should not fill out income/tax/payments etc. on page 1, where do I enter the amount $1410 that should be refunded?
In my amended 1040NR, line 72 amounts to $2010, so I could say in line 73 that I want $1410 to be refunded. But then how does the IRS know that this is the net refund? It would be nice to have a spot to enter that I have received $600 in refund, but you missed $1410 due to my negligence (like you would on 1040X page 1, but apparently I should not fill it). Any suggestions?
Also, why should I file 8843? I didn't file it with my original 1040NR.