there is form 8082 for your tax return.
https://www.irs.gov/pub/irs-pdf/f8082.pdf
check box 1a and complete the other parts
for a copy of the return form 4506
here what the instructions say
A bona fide shareholder of record
owning 1 percent or more of the outstanding stock
of the corporation may submit a Form 4506 but must
provide documentation to support the requester's
right to receive the information.........
Documentation. For entities other than individuals,
you must attach the authorization document. For
example, this could be the letter from the principal
officer authorizing ...........................................
if you can't get documentation then the IRS will do nothing. your only option would be a lawyer.
