Ten tech companies, including some of the biggest names in Silicon Valley, have registered to lobby federal lawmakers on “issues related to digital services taxes.”

Facebook Inc., Google Inc., Microsoft Corp., Netflix Inc., Airbnb Inc., Amazon.com Inc., Salesforce.com Inc., Spotify AB, Twitter Inc. and RELX Group filed separately May 3 to report that they had retained Washington-based Baker McKenzie partner Joshua Odintz, a former tax counsel on the U.S. Senate Finance Committee, to lobby for them.