I need help creating an Imputed Gross Up Element that only Includes State Taxes

Summary:

I have followed the Oracle documentation on creating an imputed gross up that includes all taxes in the past. I need the same thing except I only want the imputed gross up to include state tax.

Content (required):

I tried it myself by creating a custom secondary classification for the supplemental element. It worked for the most part, except the supplemental element doesn't seem to be getting picked up or created from the imputed gross up. That then causes no earnings for the taxes, so my state tax falls into the Not Taken bucket.

Can someone please help me troubleshoot this?