Question: what is the difference between w2 and w2c?
Answer: Unlike W2 form, W2C is issued on as-needed basis. After W2s are issued and reported to the SSA, you need to use W2C to make any and all changes to the original W2. There is no specific deadline for filing W2C. ... Similar to W2, if you issue more than 250 W2Cs, you are required to file the W2Cs electronically.