I cant find the control number on my w-4. Can you help

Do you mean your W-2? If so, please see answer below.

A Control Number (Box D) is used by many payroll departments to uniquely identify a W-2 in their system. If your W-2 doesn't have one, it's no big deal – you can simply leave it blank.

It is telling me that i need to know my control number to fill out my W-2 info

W2 box d Control number is not needed.  See

https://ttlc.intuit.com/community/forms/help/i-have-no-box-d-or-control-number-on-my-w-2/00/26469

The control number in box d is not required by the IRS - it is used by your employer.  As a result, if it causing you trouble, just delete it.  If it is not causing you trouble, then leave it in - it won't matter.