Bainbridge Island, Washington-based Avalara, a provider of web-based sales tax management services, said Wednesday that it has acquired Baton Rouge, La.-based Trustfile. Trustfile develops software used for automating sales tax electronic filings and payments. Terms of the acquisition were not disclosed. According to Avalara, Trustfile has 6,000 customers in Texas, Oklahoma, Minnesota, Iowa, Tennessee, Alabama, Georgia, Florida, South Carolina, New Jersey, Pennsylvania, Connecticut, and Wisconsin. Avalara said the acquisition would allow it to accelerate delivery of e-filing capabilities.