After you file

From my current employer they have that my W2 shows 3 allowances. I've only ever selected 0 or 1 for my allowances. I just noticed it now while I was filing my taxes that the allowances are incorrect(I'm going into work tomorrow to see my physical documents and validate whether I put 3 down). I want to file my taxes with the W2s I have that are correct and dispute the one that is incorrect. So, I have to hold on filing completely until I get my W2 from my current employer fixed?