Are you talking about putting in last years information so you can show it on the "two year comparison"?

You can enter that right on that form taking the information from the prior return.

To enter more detailed information would require using the prior years program and re-entering all of the detailed information to create a complete copy of the prior return.

If you are talking about important information that carries from one year to the next, there is a carryover schedule you can open up and enter the carryover items from the prior return.