Log into IRS.gov by going to the account log-in page and entering your user ID, which takes you to another secure form. From there, you should follow the prompts and instructions.
If you don't have a log-in user id, you can sign up for an online account through IRS.gov. The IRS uses a number of different secure ways to verify your identity. Those verification features must be the same information that is on your most recent tax return. Some of those features include your name, Social Security number, date of birth, filing status and mailing address. The IRS also asks for third-party verification questions, such as any prior addresses, mortgage information, and other pieces of information that only you should know.
There are a number of different services you have access to with an online account through IRS.gov, including ordering a transcript, making online payments to your tax account, and electronically file a tax return. If you are a tax preparer professional, you can register to become an online e-file provider through the IRS, as well as utilize a number of different tools and services available for professional tax preparers. Certain approved tax professionals can also gain access to their client's tax transcripts.