Avalara has acquired EZtax, which makes tax compliance products for the telecommunications industry. The company's software, also called EZtax, calculates and files taxes due on such services in the United States and Canada. Terms were not disclosed. The move was the latest by Bainbridge Island, Wash.-based Avalara to purchase companies that make specialized indirect tax applications. In March, the sales and use tax vendor bought Hotspot, which made tax applications for the vacation rental industry. EZtax was founded by CEO Tim Lopatofsky.