Affidvait of support?

I am filing for both of my parents for a visa but on separate I-130 petitions and so I will also have to file separate affidvaits of support. However, I am going to be the only sponsor based on my wages alone but my tax returns that I will use for support of this are filed jointly with my husband. Do I qualify for the I-874 EZ or will I have to use the old I-874. Either way will I have to use my husband as a joint sponsor because we share tax returns even though my wages alone meet the poverty requirements. Thanks.