I assume I should write "Nonresident Alien" on the paper and file it by mail in such case, but the instruction on Turbotax says below.

"Filing your return on paper is not recommended. If it is necessary to file a paper return, do not write on the return. Only signatures are allowed. Other handwritten information will not be used in tax computation or for processing your return."

The problem is I need to write "NRA" by hand because we can add only numbers for SSN on Turbotax.

That would be great if I could know whether it's no problem to ignore the instruction and or not.