Investors & landlords

Unfortunately, the preparer that did my return in 2018 did take the washer and dryer as a section 179 instead of the bonus depreciation.  Do you suggest the 2018 return be amended to correct the depreciation? I have recently seperated from the military and had two rentals that I sold in 2020 so Im trying to determine if I should get 2018 correct before attempting 2020s return.  Thank you!