there is no way to attach an externally prepare PDF 8283 or any other form to your return for efiling purposes.
if you don't need to submit an appraisal, you'll need to create the 8283 through Turbotax
if you need to submit an appraisal what you can do is use form 8453 to mail in the official 8283 with appraisal while including a dummy 8283 in the e-filed return. it will still need to be created through Turbotax
