I failed to claim the QBI deduction on my 2018 return. Can I claim it for 2019?

If you failed to claim the QBI deduction on your 2018 return but were eligible to do so, you’re not alone. The Treasury Inspector General for Tax Administration identified nearly 900,000 2018 returns that didn’t take the QBI deduction even though it appeared they qualified for it. You can’t simply take the 2018 deduction your 2019 return. You may want to file an amended return for 2018 to claim the omitted deduction. Then determine whether you qualify for the QBI deduction on your 2019 return.