Did you use computer software to generate your tax return, eg turbotax, etc? I would think the software would select the standard deduction which is quite high now.
The maximum charitable deduction is only $300.
We use Turbotax. Turns out my wife simply forgot to fill out the 8283 form. In the past, we have always filled out the 8283 and wrote “See attached sheets” which is our Excel list of deductions we prepare during the year. Somehow, in 2019, she sent in our Excel list but forgot to prepare the 8283. So it wasn’t Turbotax’s fault — it was operator error.