“what is the diffrence betweem tax return copies and tax transcripts”
The copies of tax returns are the copies of actual forms/papers/documents that someone files with IRS. While Tax Transcripts are VERY brief version of tax return forms. It contains Very limited information in few words. And, it is given/issued by IRS unlike tax return forms.
“I have copies of my tax returns, are they not sufficient?”
The simple answer to your this question is-No. Because, if you would present/show/submit uncertified copies of your tax returns to USCIS, then they have no way to know whether or not it is a copy of your actual tax returns that you filed with IRS unless you have CERTIFIED copies of them. Therefore, it is very important for you to have Certified copies of your tax returns for USCIS purpose; otherwise don’t be surprise if USCIS would refuse to accept it, or would delay your application until they get verification on those tax returns thru IRS. You may visit local IRS office to get certified copies at the spot.
However, it is very important for you to know that USCIS is not interested to know how much income you had/have, nor they are interested to know what are your deductions or any other details of your tax returns. Rather they just want to know whether or not you have filed tax returns if you were required to file it. That is. That’s why, the copies of whole tax –returns forms are not necessary for them to see. Thereby, they are more interested to see Tax Transcripts over tax return forms as Tax Transcript say everything about your tax history of many years in one page. Also, it is very easy to obtain a tax transcript.
So, don’t raise your hope of relaxing so soon if you don’t have CERTIFED copies of your tax returns with you.