Deductions & credits

I just got off the phone with Intuit TT and they thought it was my outdated Windows version.  But...it is not.  I cannot get this issue to work on my iPad, Chromebook, updated browsers, nothing.  I've tried to find where the system might be counting the extra $300 donation credit, but I cannot seem to find the screen to resolve this!  I cannot see the 2020 cash donation option anywhere.  When I look at the preview of the 1040, it shows standard deduction plus the $300 cash donation, which in fact is more than my itemized total (but my total tax due with itemized is less!).  It is showing my the higher tax due amount.  Very frustrating!  Thanks.