If you are using Ancestry.com. Find the person you are looking for and then scroll down to source citation. For 1910 the microfilm series isT624 followed by a number (roll number). If you are not using ancestry, use Description of Census Rolls (stevemorse.org) to find the year, then state, then ED. 1910 starts about half way down.
Dear Ms. Johnson,
Thank you for posting your request on History Hub!
Please review the NARA web pages 1900 Federal Population Census Schedules
We hope this is helpful. Best of luck with your family research!