It’s not letting me continue after entering my control number listed on my W-2. It highlights red, but I’m entering exactly what it says

[MarilynG]

If you imported your W-2, you can Delete it and Enter it Manually without the Control Number. 

It is not necessary to file your tax return.

From TurboTaxGeoffreyG:

"The Box D Control Number is a code that uniquely identifies your particular W-2 document in your employer's records. This number is assigned by a company's payroll processing software, and is needed if attempting to electronically import your W-2 into a tax software program (like TurboTax).  Please note that not all W-2s (or employers) will necessarily include or support a Box D Control number.  Your alternative to importing a W-2 document is to simply input the information manually."