When you file your tax return it does not matter when anyone else files, or files at all. You are required to check the "another taxpayer can claim me" box reguardless if the other tax payer actually claims you or not. The question is: *can" another tax payer claim you (there is a 2nd question that asks if the other taxpayer actually did claim you, but that is only used for certain educational credits.)
Your W-2 information only goes on your own tax return, nobody elses.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
