This FAQ has the methods to find Mac files.
https://ttlc.intuit.com/community/tax-data-file/help/find-your-tax-data-file-in-mac/01/26206
If not found then you must have deleted it unknowingly. You are out of luck unless you keep an backup or use TimeMachine to recover the file.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
