Is earning money permissible from working as a technical support specialist for a car repair cost estimation program, knowing that my work is limited to diagnosing car errors and I do not deal directly with insurance companies or independent appraisers, and that the program includes a field for calculating local taxes to ensure the accuracy of the total repair cost estimation?

There is no objection to creating a program for estimating car repair costs, even if insurance companies benefit from it, because it helps in estimating repair costs for the at-fault party or the one bearing the warranty. This program is not related to the insurance contract itself; rather, it is a means for the wronged party to receive their due. It is also permissible to add a field for tax in the program if its payment is necessary, as it is part of the repair costs. As for assisting car maintenance technicians in diagnosing faults, this is an entirely permissible act and has no relation to insurance or taxes.