How do I enter Charitable Mileage if I only have the total miles and number of trips? Each trip varies in miles.

[jbatschi]

Total Miles = 1154

Total number of trips = 155

Then number of miles driven each trip varies.

[JohnW15]

The IRS isn't interested in seeing the mileage you expended on every trip you made in your charitable work, just the total mileage. 

You can enter that you only had one trip, then include the total miles for the year as the miles driven.   No details are transmitted to the IRS.

Just keep your records of the separate trips just in case there is ever a question about your deduction.