If you are now trying to file a 2018 return, use "zero" for the AGI. If zero does not work then you have to print sign and mail your 2018 return.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return.
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