uscode.io
U.S. Code Title 26
Subtitle F
Chapter 61
Subchapter A
Part IV
Night Mode
Part IV: SIGNING AND VERIFYING OF RETURNS AND OTHER DOCUMENTS
Section 6061: Signing of returns and other documents
Section 6062: Signing of corporation returns
Section 6063: Signing of partnership returns
Section 6064: Signature presumed authentic
Section 6065: Verification of returns