Then, determine the final volume needed to dilute 20.0 ml of 1.00 M NaOH to 0.25 M. Next, find the volume of water which needs to be added. Finally, determine the moles and the mass in grams of NaOH in the solutions.

Do I take 60 ml and convert it to moles and grams?

60ml times 0.25? To get moles

I answered this for you about noon.