How much is your schedule A itemized deductions? How much is on 1040 line 12? Maybe the Standard Deduction plus the extra $300 for Charity on line 10b is more than your itemized deductions.
There is a new FAQ for the Itemized vs Standard Deduction confusion
https://ttlc.intuit.com/community/charitable-donations-deductions/help/standard-vs-itemized-deductio...
