Coronavirus stimulus payments are not considered as "income" in bankruptcy and do not have to be listed on your means test form or on your Schedule I.
If you have received your stimulus check, the only place to list it is in response to your Statement of Financial Affairs Question No. 5.
If you haven't received your CARES Act Payment authorized in March 2020 yet, it has to be listed as an asset on your Schedule A/B. The stimulus checks approved after March 2020 are not considered property of the bankruptcy estate and do not have to be listed.
If you were waiting on your stimulus check when you started filling out the forms and have since received the funds, you can use the case editor to remove the it from your Schedule A/B.