If you have a prior year tax return available, the only way to compare using TurboTax would be for you to purchase and download one of the TurboTax prior year desktop editions (2021 thru 2023) to install on a personal computer, Windows or Mac. Then complete the tax return using TurboTax so that you can compare to what you have on hand.
Go to this TurboTax website for prior year desktop software - https://turbotax.intuit.com/personal-taxes/past-years-products/
@rjc1997 assuming that you are talking about the downloaded/ CD product ( I am familiar with Windows only ), and unless you are quite familiar with tax regime, I would suggest you to buy the 2023 product and use it to duplicate your 2023 return. This would give you a good intro to both the product and to the tax laws ( for your specific case ). It costs a little but assures you that you can handle the product on your own.
The on-line product is ONLY available during the tax filing season and for the current tax year.
Does this answer your query or did I mis-interpret your question ?