The Rev. Creflo Dollar, of World Changers Church International in College Park, and Bishop Eddie Long, of New Birth Missionary Baptist Church in Lithonia, were among six media ministries from which Grassley requested records a month ago.
Grassley, the ranking member of the Senate Finance Committee, has investigated other nonprofits for misuse of funds.
His letters to the ministries note the leaders' lavish lifestyles of flying in private jets, driving expensive cars and living in mansions.
He has raised concerns of whether the ministries were complying with all the laws that govern nonprofits.
Three others churches - led by the Rev. Binny Hinn, of Texas, Randy and Paula White, of Florida, and Kenneth and Gloria Copeland, of Texas - had not turned in records as of Thursday, the deadline for Grassley's request.
An Associated Press report says Hinn said he will respond in early 2008.
Only Joyce Meyer, of Missouri, has complied.