I've entered my clients Economic Impact Payments received info into the Recovery Rebate Credit boxes in ProConnect, he received Economic impact payment 1 $1400 based on 2019 AGI but he didn't receive Economic impact payment 2 so entered '-1' in box, and his 2020 income is higher but I want to use 2019 income to get 2nd stimulus payment for him in tax filing of 2020, with this entry's form 1040 line 30 is still blank? any idea? please suggest options.

Thanks in advance.