You did prepare the return...so nope, ya' can't remove your name.  The IRS doesn't care that the check bounced.

"Paid preparer" means you are a professional preparer in general, not that a specific client has/has not paid you.

You "can" discuss this with your client & threaten, but it's an empty threat.

Bounced checks are illegal in most jurisdictions; perhaps a call to the local authorities?

In my small community, I call the bank the check was drawn on to see if/when funds are available & run down to the bank & cash it