If you paper-file your mother's return, simply attach the signed Form 2848 to the complete return.
If you eFile her return, however, the process is a bit more complicated. You'll eFile the return as normal through TurboTax. Then, you'll need to send both the signed Form 2848 and the IRS Form 8453, U.S. Individual Income Tax Transmittal for an IRS e-file Return to the IRS. On Form 8453, you'll check the second checkbox, for "Form 2848, Power of Attorney and Declaration of Representative." You should have checked the box in section 5a of the Form 2848 and entered a description to indicate that you have authorization to sign tax returns.
There's no signature requirement on Form 8453. If you are e-filing the tax return, mail Form 8453 to the IRS within 3 business days after you have received acknowledgement from your intermediate service provider (ISP) and/or transmitter that the IRS has accepted your electronically filed tax return.
If you don’t receive an acknowledgement, you must contact your intermediate service provider and/or transmitter.
Mail Form 8453 to: Internal Revenue Service Attn: Shipping and Receiving, 0254 Receipt and Control Branch Austin, TX 73344-0254
See this TurboTax tips article for more information about using Form 2848.
To e-file a California return with a Power of Attorney (POA), submit Form FTB 3520-PIT via your MyFTB account to link your account, then use authorized tax software to e-file. The POA allows signing only if the taxpayer is incapacitated or continuously absent from the U.S.
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