Income proof for GC sponsorship

[usaca]

Hello,

We are Canadian citizen & planning to work on TN visa in USA.

Our kid is USA born, natural citizen and 18 yrs old now, once child is 21 years of age, & can sponsor Green Card to parents.

Sponsor must show enough income to support sponsoring parents. Can working parents income (working on TN visa in USA) can be submitted as family income for child who is filing GC for parents? or Child needs to start earning enough to submit income to support?

Thanks.

[newacct]

The intending immigrant's income can be counted as part of the sponsor's household income on the sponsor's I-864, if the intending immigrants lives in the same residence as the sponsor, and the intending immigrant's income will continue after immigrating (if the intending immigrant is working in the US, this should be met).