You can always file a late tax return, the IRS will always accept it. There may be some interest and penalties if you owe tax and you file late, but the longer you wait, the more the penalties will be.
Turbotax is still available for the 2024 tax season, both online and as software you download and install on your own computer. The online version is "free to start" and you only pay if you need to file. The download version is pay up front.
You can use this web site to find out if you are required to file.
https://www.irs.gov/help/ita/do-i-need-to-file-a-tax-return
If your only income is social security, that is tax-free and you don't need to file. As you add more types of income (pension, small job, self-employment) it becomes more likely that you need to file. For any combination of wages, pension and social security, check the IRS web site calculator. But, if you have self-employment, you must file if your net profit from self-employment is more than $400, no matter what other income you have. If you file a tax return for any reason, you must report all your income, no matter how small any one item might be.
