I entered my charity amounts and information but my tax due amount did not decrease. Any reason as to why this did not happen?

Until the total of all of your SCH A itemized deductions exceeds your standard deduction, those itemized deductions have no impact on your tax liability.

Standard Deduction
Single - $12,000
Married Filing Separate - $12,000
Head of Household - $18,000
Married Filing Joint - $24,000

Additionally, itemized deductions for SALT (State And Local Taxes) is limited to a maximum of $10K ($5K if married filing seperate.)