It looks like Form 4852 is an acceptable (though not preferred) form that I could fill out. I'm just wondering if it will jive with TurboTax.
As a last resort, you can file a conventional paper return that includes IRS Form 4852 if you haven't been able to get a W-2 from your employer. Here's how to fill one out:
Note: Returns including Form 4852 can't be e-filed because of IRS regulations. And it will take several weeks, maybe months to process, so make every attempt possible to get a copy of the w-2 before resorting to filing the substitute w-2 (Form 4852).