I received an email this morning from the Intuit Developer Group that beginning August 1, 2025, they will be discontinuing support for minor versions 1 through 74 of the QuickBooks Online Accounting API.
Here is the blog linked in the email announcing the change.
From the email:
In your API request, if you specify a value for the minorversion parameter that is less than 75, it will be ignored and the system will respond with data corresponding to minor version 75.
If you don't specify a minor version in your request, the response will default to minor version 75 rather than the base version.
Currently, this gem uses minor version 47, so the minor version will need to be updated to avoid breaking changes when Intuit begins responding to version 47 requests with version 75 responses.