Tri-Check Income Tax Service is located in Upland, CA. We have been proudly serving the Inland Empire since 1941. We offer services in Tax Return Preparation, Financial Services, Mortgage Services & Notary Services. We specialize in Retirement Planning and IRAs. We offer Peace Of Mind to all IRS problems and audits. Plan Ahead For The Right Move.Repair Damage From The Wrong Ones Professional Advice & Avoid Costly Errors.