will my offer of admission be rescinded?

For one school I applied to we had to self report our grades and I just realized I accidentally entered wrong information. I put that I received an A in Algebra 1 in middle school, but I found out I actually got an B. This was completely accidental and a pure mistake. I have been admitted to the fall 2023 class and I hope this does not impact my admission decision. I have emailed admissions about my situation, but do you think this could cause my decision to be rescinded? I am so anxious and mad at myself for making such a stupid mistake

No

It’s good that you have already taken the steps to notify admissions! I agree with @skieurope. Especially since this is from middle school, you should be fine

No, especially since it was from middle school.