Deductions & credits

All I need to know is: 

 When I wrap up my Federal return (TT DELUXE CD/Download Windows) it tells me the Standard Deduction is best. When it reaches the Charitable Cares Act screen, shaded in the money box is the figure of my total cash Charitable Contributions $1750.00. TT knows this amount because I completed all the Step-by-Steps to itemize in order to decide which would be better for us. SO..... am I supposed to leave the money box as is and hit Continue OR am I supposed to type in $300.00? It really doesn’t explain clearly what step to take. Leave as is with the shaded $1750 or type in $300? Thank you! [Itemization is usually better for my State return so I do not want to delete all my hard work.]