It's important to keep in mind, it is not an all-or-nothing feature. When I first converted, three tax seasons ago, from print-sign-scan PDFs to e-sign, about 85-90% of my existing clients had no problem with it. For the remainder of those I still serve, I do still send them PDFs that they can print, sign, and scan or photo back to me. It also reminds me that they will probably also need other extra-fee paper processing during the prep process. [say
that five times, fast, starting with "paper"
]
I use UltraTax; the vendor has an easy to use e-sign for engagement letters that costs $1 per successful signature (including MFJ), and is integrated with the tax return software for printing and status tracking.