How do I go about filling a prior year return I put both years on one tax return this year

To complete and file a 2023 tax return using TurboTax you would need to purchase, download and install on a personal computer one of the 2023 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/

A 2023 tax return can only be printed and mailed, it cannot be e-filed using TurboTax.