the only way to enter a return into TurboTax is through the step by step process, OR, forcing the data into forms in Forms Mode.
The latter is not sufficient because TurboTax uses worksheets to do calculations and keep history.
The worksheets make it possible for each of your entries to propagate to all the relevant forms and schedules.
That's what you're paying for.
That is just the nature of tax software.
For records of all years, see Adobe Reader, and your printer.
Keep a PDF file and a paper copy in your file cabinet, along with relevant notes to remind you of what you did in the past.
