if you are not the custodial parent, the one who had custody the greater part of the year. Your returns needed to include form 8332 or a substitute statement containing the same info as the 8332. It must be signed by the custodial parent. To allow e-filing on your 1040, you can submit the 8332 with form 8453 that Turbotax can prepare.
when and where to mail the 8453/8332
When and Where To File
If you are an electronic return originator (ERO), you must
mail Form 8453 to the IRS within 3 business days after
receiving acknowledgement that the IRS has accepted
the electronically filed tax return.
If you are filing your tax return using an online provider,
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 to:
Internal Revenue Service
Attn: Shipping and Receiving, 0254
Receipt and Control Branch
Austin, TX 73344-0254