Ibrahim,
No Special form is required if the taxpayer only needs a return transcript. A tax return transcript will show all line items on the original return. If the taxpayer amended, I suggest both a tax return and an account transcript. There are a few different ways that the IRS will provide the transcript.
First, you can request one online. http://www.irs.gov/Individuals/Order-a-Transcript All of the information must exactly match what the IRS has on file in order for the system to accept it. 5-10 days to receive the transcript.
Second, You could call 1-800-908-9946 and order through the automated system. 5-10 days to receive the transcript.
Finally, If you need it in a rush, you can call the customer service line 1-800-829-1040. The IRS will fax the return transcript, but the Taxpayer must be at a secure fax for up to an hour. Usually the transmission does only take a few minutes. Again, the IRS will not fax unless the Taxpayer is physically at the secure fax.
You could fill out the 4506-T Form, but in my opinion, it will take longer to get the info you are looking for.