Unfortunately, Turbotax has no provision to include a scanned attachment of any sort that isn't a standard or required form.
You may have misunderstood my post - what I meant to say was "Just fill out Form 2848 and attach your Durable POA (with Mom's signature) to it", then send it in with Form 8453.
Most states accept IRS' POAs. However, I'm not familiar enough with Ohio's procedures to tell you whether they do or not.
