Do we need to attach W2 to Michigan tax return for 2018?

If you are filing by mail you include all the tax forms for the MI return.

Note: I edited the answer due to the following:

I included the identify theft attachments and the instructions actually say to only include the tax forms.

   https://www.michigan.gov/documents/taxes/MI_1040_Instruction_Book_Instructions_Only_609092_7.pdf

[Edited 4 -14-2019 9:28 AM PST]

Edited above answer

So not necessary to include W2s correct?

Correct per the instructions I only saw if for ID theft.