You can't file or amalgamate previous years with your 2023 return, each return must be filed separately, and there is a plethora of reason for that, like tax tables change due to economic each year, standard deduction changes, there may be some credits which apply for each year that don't, you might have deduction carryovers. Good news is you can contact Intuit and get the software for those years or contact the IRS at the IRS website, IRS.GOV.
