I have e-filed with it for many years (for donated Mutual Funds), without the signature in the E-filed form.
Of course, you still have to store the 8283 in your yearly paper tax folder in case the IRS decides to review your taxes, and may want a copy at that time. But I've e- filed with the generated TTX 8283 for more than 10years with no questions.
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You just enter it as a charitable contribution, indicate the charity (or Donor advised fund) and indicate it was stock that was donated......the value of the donation (which the charity sends you), the cost basis of the donation, and then TTX creates a form 8283, just for e-file purposes...
[Edited later} But see the conversation below about TTX "Online" seeming to require it, and even paper/mail filing, even for Stock/MutualFund/Securities in Section A Part I.
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Though, a note from my Fidelity Charitable 8283 says:
"Please note that IRS Form 8283 is not required to be signed by a Fidelity Charitable® representative
unless Section B, Part I is applicable to your filing."
....and the stock donations I make are always in Section A Part I...as should yours, at least for stock/mutual fund donantions....but depending on the charity, they may send you a signed 8283 anyhow.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
