After 25 years in business, the real estate property tax firm Amari & Locallo is looking to grow beyond the borders of its home state. “Our newest endeavor is to expand our practice outside of Illinois into a national practice,” said Joseph F. Locallo Jr., the firm’s co-managing partner. “Our long-range plan is to develop more business locally and outside of Illinois in the real estate tax assessment area.” Over the last year or so, the 10-lawyer firm has filed appeals for clients …