How can I do my 2023 taxes?

To do a prior year return you have to buy the Desktop program here,
https://turbotax.intuit.com/personal-taxes/past-years-products
You will need a full Windows or Mac to install it on.

Or how to finish a return you started online
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-started-in-turbotax-online/01/26322

If you have a simple return and want to file for free you can fill out the forms by hand. Here are some basic forms…..

Here is the IRS 2023 Form 1040
https://www.irs.gov/pub/irs-prior/f1040--2023.pdf

or if you want bigger type use 1040SR for Seniors,
https://www.irs.gov/pub/irs-prior/f1040s--2023.pdf

And 2023 Instructions
https://www.irs.gov/pub/irs-prior/i1040gi--2023.pdf

2023 Tax and EIC Tables
https://www.irs.gov/pub/irs-prior/i1040tt--2023.pdf

Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2023.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2023.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2023.pdf

Then when you do file 2024 enter 0 for the 2023 AGI since you are filing 2023 late.

You have to print and mail prior year returns. When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return. Don’t forget state.

As xmasbaby0 mentions above, You can do them in Turbo Tax Desktop by purchasing the TurboTax Desktop 2023 tax software. You can use this link, Click here.

You can also fill them out by hand and mail them in using Form 1040 and Form 1040 Instructions for 2023. You will mail your paper return along with your required tax documents and a check if you owe tax. You can select your state in this article to find the address to mail your federal return to. Click here.

To Assemble Your Return: 

• Place any schedules and forms behind Form 1040 or 1040-SR in order of the “Attachment Sequence No.” shown in the upper-right corner of the schedule or form. 
• If you have supporting statements, arrange them in the same order as the schedules or forms they support and attach them last. 
• File your return, schedules, and other attachments on standard-size paper. 
• Cutting the paper may cause problems in processing your return. 
• Don’t attach correspondence or other items unless required to do so. 
• Attach Forms W-2 and 2439 to Form 1040 or 1040-SR. 
• If you received a Form W-2c (a corrected Form W-2), attach your original Forms W-2 and any Forms W-2c.
•  Attach Forms W-2G and 1099-R to Form 1040 or 1040-SR if tax withheld

You should mail your tax return using Certified Mail through the USPS or through UPS so you have tracking information and proof that you filed your tax return.