1120 Tax Filing vs General Ledger for S Corp

 That's an inherently time-consuming task, and since the statute's run on a 6 year old return, it may not make sense to even start the project.

That aside, I set up an Excel with per QB and per TR columns, use Excel to figure the discrepancies, and move rows out of the field of work as I manage to lump things together. Watch out for book-tax differences and tax AJEs never booked.

If you think the file was set up well and used correctly, then look at Reports menu > Accountant and Taxes, for the Tax reports here. This might get you close.

You can map accounts now, and then the report will work for you. That only takes about 5 minutes.