Charitable Contributions

In Smart Check (Home/Business) I am getting the following message, "1040/1040SR Wks: Charitable Contributions: Charitable Contributions has an unacceptable value." A drop box comes down and It instructs me to enter a number equal to or less than 300. --- The correct number for the page I entered all my contributions is in the box. I have put several numbers below three hundred and the error still comes up. What can I do to fix the problem?