Schedule-C, self-employment (你收 1099-misc?).没啥费用,也可不file S-C,就填 OTHER INCOME Belong to self -employment. 我们用的software有这一input box,会 自动算self-employ tax 及adjustment to income.
I had the same experience. When my second boss interviewed me, he was very interested in the reference from my phd advisor, and he didn't ask for the reference from my postdoc boss.