you mean you didn't do your 2023 tax return that was due in April 2024.
then you need the Turbotax desktop app
https://turbotax.intuit.com/personal-taxes/past-years-products/
you need a full PC or Mac and a way to print out the return
system requirements
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-system-requirements/minimum-syst...
the return can no longer be e-filed.
when you mail it use a tracking service
be sure to attach any forms that have withholding taxes like a w-2
if you have a state return, generally, it also requires attachment of forms with state witholding
read the Turbotax filing instructions
