2020 Taxes - Claim First and Second Stimulus Check based on 2020 income not 2019 return

My wife and my income was higher in 2019 due to a severance package we received. In 2020, we made well under the $150k threshold and never received the first or second stimulus check. I purchased turbo tax 2020 and don't see a way to claim/recover the stimulus payments. Any advice/experience on how we can get it?