Thank you for your comments!
Garemani, is your case EB-1?
I was just wondering, what would be the purpose of including a tax return? My 2005 tax return doesn't really prove anything (I'm not showing hardly any income last year), least of all that I get high salary in my field (my case is based on other "extraordinary" reasons). So what would it help? I could include an I-134, an affidavit of support from a friend, but the EB-1 EA seems to be achievement-oriented rather than employment/income-oriented... But should I enclose an I-134 just in case as well?
I just wonder, how my tax return would help... And if it wouldn't, should I present it?
I really appreciate your feedback!