How do I submit a substitute w-2 form? When turbotax says "Do any of these uncommon situations apply to this W-2?" there is no box to check signifying a substitute.

See this TurboTax support FAQ for a Form 4852 (W-2 substitute) - https://ttlc.intuit.com/questions/3351348-how-do-i-file-a-substitute-w-2-using-form-4852

It shows me a different, but similar page. It doesn't have a "substitute form" check box. Instead it says "Inmate or halfway house".

The check box for submitting a substitute W-2 is near the bottom of the list of uncommon situations. It says "Substitute form."

It shows me a different, but similar page. It doesn't have a "substitute form" check box. Instead it says "Inmate or halfway house".

It is right above the inmate option ... see the second screenshot in my answer ... if you don't see it then delete the W-2 and enter it again.

Try logging in with a different browser.