Could someone advise on how to e-file a Wisconsin (WI) return through PTO?  

The WI return is prepared in / through PTO.

I'm ready to e-file the WI return (1NPR) for the client.  But, could not find e-file authorization form for WI? 

Do I need to file 8453W for the taxpayer? Is yes, how?  8453W does not seem to be in PTO either? 

(This is 8453 W for Wisconsin; not the 8453 for IRS.)

Thank you.