Comcast sues to invalidate a Washington state law that taxes online ad services, set to take effect in October; major ad industry groups also oppose the law (Wendy Davis/MediaPost)
Wendy Davis / MediaPost:
Comcast sues to invalidate a Washington state law that taxes online ad services, set to take effect in October; major ad industry groups also oppose the law — Comcast has sued to invalidate a new Washington state law that imposes a tax on online advertising services such as creating …