Do I wait for corrected Box 12 Code DD values from my second employer?

My W2 from one employer has a value in Box 12 for DD. My other W2 does not, however I heard my employer may be reissuing our W2 to include this information. Am I able to submit my taxes without the second DD amount complete? Will I need to refile if I receive an updated W2 with the DD amount from my other employer.
This is two employers where I had similar benefits, each for part of the year.