Mistake in Activities and Awards page

I applied to the UCs as a transfer student, and when I was inputting my Activities and Awards, I listed a part-time job that I had started 3 months prior to submitting the application, however, I entered the correct start date (August 2019) but I entered that I worked after 12th grade for 8th months and that was how long I intended to stay at my job, but I didn’t realize the math wouldn’t add up. Is there a way to fix this and how? and would this cause my decision to be revoked if they find that mistake?

I’m sure they won’t notice or they’ll assume you mean it through spring.

Should I contact the UC Application center just in case?

It’s up to you. I don’t think it’s an issue but you can.