36100
The following diagnostic is generating:
Form 8283 #{PrefixNum}: If the amount on Schedule A is greater than or equal to $20,000 and Form 8283, Section B, Part 1, Line 4 checkbox is marked as an art contribution equal to or greater than $20,000, a PDF of the Art Appraisal must be included with the e-file.
Solution:
Link to form: Form 8283>Art Appraisal