8老师，皮老师，及各位大侠，有一关于EB1A急问题请教，多谢了!

I am planning to file EB1A PP DIY. What kind of additional form(s) do I need to file in addition to I-140? Is I-907 the only other form to be co-filed? Another question is that, as a fourth year postdoc, am I eligible to file PP EB1A (because I heard some people said that you have to be in the last year of H1 (6th) to be eligible for PP filing)?

Thank you a lot!