Yes, you can only deduct cash contributions greater than $300/$600 or non-cash contributions on your Schedule A, Itemized Deductions. If the total of your itemized deductions does not exceed your Standard Deduction, you are probably better off taking the standard deduction + 300/600 for your cash contributions. I only say probably because you may benefit in certain states from itemizing since you can only itemize on the state return if you itemize the federal return. Kansas is no longer one of those states.
If you do not use your charitable contributions in excess of $300/600 this year because you do not itemize, they are lost. They cannot be carried forward. Other than itemizing or taking the $300/600 cash contribution that is allowed in 2021 to all taxpayers, there is no other way to claim charitable contributions.
