Why won’t my tax form accept my control number to Box D when I type it in EXACTLY how it’s on my taxes

The IRS doesn't care what's in box D.  If you are having trouble getting the TurboTax program to accept the Control Number on your W-2, just enter any number in this format: 5 digits, space, 5 digits (for example 12345 67890).

This short post explains the issue very well: Box D or Control Number Problems with your W-2?