Will a flag be thrown at the IRS if my EOY retained earnings in 2020 does not match the beginning year balance on the 2021 tax return?

My accountant last year did not properly report my EOY retained earnings in 2020 on Schedule M-2. This year I'm using Turbo Tax for business and caught the mistake. Does anyone have an opinion on whether or not this will throw a flag at the IRS with my 2021 filing?  Should I refile the 2020 return to fix Schedule M-2?