I donated an item to a 501(c)3 non-profit and have a receipt, but I don't understand how to enter its worth into TurboTax, it keeps saying that the value is not accepted?

If you are not itemizing deductions you can skip this entry.  

I don't see the option to skip it, though. It says I have to review, then fill in a value (which is always unacceptable, no matter what I enter), and hit continue. I can't even put in zero or leave blank or anything, it's got me in a loop.