Is it required to include the address on the charitable contributions worksheet?

No, the address is not required.  However, you should retain it with your records.

Thank you very much Karen P.

That's what I thought, but I am getting an error message on one charity for which I have not entered an address.  Is this going to hold up my filing?

Yes, you do need to enter an address for that charity. Here is the criteria for reporting a donation to a qualified charity. 

1. Amount of donation.. 
2. Organization's name and address;
3. Date and location of donation;
4. Reasonably detailed description of the property.