If you don't have a way to access your account to get your federal tax return information, you can always contact the IRS and ask them to mail you a copy or a transcript of your return.
The IRS website lists steps on how to go about obtaining the tax return: https://www.irs.gov/uac/newsroom/how-to-get-a-transcript-or-copy-of-a-prior-year-tax-return
