Contact Us Do you have a tax question or an IRS letter you don't understand? Contact Us Now! 790 Barron Boulevard Grayslake, IL 60030 Phone: (224) 381-2660 Fax: (847) 557-3913 Email: frontoffice@hamiltontax.com Please enable JavaScript in your browser to complete this form.Name *FirstLastEmail *Phone *Estimated IncomeDo You Currently Have a Business?How Many Real Estate Properties Do You Own?Do You Have a Legal Entity (LLC, Corporation, Trust)?Submit Full 1Got a letter from the IRS and unsure what to do?Full 2Did you sell a property this year and need tax mitigation?Full 2Started a new business and need proper tax planning and savings?