 Call 800-927-2400. That's 800-927-2400. 800-927-2400. News Talk KBOI. Nate Shellman for Idaho Tax and Bookkeeping Services. If you're struggling with back taxes, you're not alone. Many people and businesses face the same challenge, and it can be overwhelming and stressful, but there's a way out. Make the call to Ilya or Nina at Idaho Tax and Bookkeeping Services.