If your property is inspected from 04/15/19-12/31/19 and omitted property was discovered, or items removed, you will see the adjustment on your 2020 tax bills.  If your property is inspected from 04/15/20-12/31/20 you will see the adjustment on your 2021 tax bills.  If  your property is inspected from 04/15/21-12/31/21 you will see the adjustment on your 2022 tax bills.  And so on.   Look for your notice of assessment which is mailed out every year at the end of February to see how your assessed value and taxable value is impacted.