amex 4506 form 一直过不了 说签名有问题。我file tax 都是用的 turbotax，签名是不是得用 agi 而不是自己的签名？
想问下 大家都怎么输入的 signature？
from irs:
" When self-preparing your taxes and filing electronically, you must sign and validate your electronic tax return by entering your prior-year Adjusted Gross Income (AGI) or your prior-year Self-Select PIN.
Generally, tax software automatically enters the information for returning customers. If you are using a software product for the first time, you may have to enter the information yourself.
If you have an Identity Protection (IP) PIN (via a CP01A or the Get an IP PIN Tool), you must enter it when prompted by your software. It will serve to verify your identity instead of your prior-year AGI or prior-year Self Select PIN. You can opt into the IP PIN program through the online tool."
