updating tax rates in CETEC

Is anyone here managing tax rates within CETEC?

We have done so manually in the past (for just a handful of records) but is there an easy way to import and maintain current tax rates for ALL U.S. cities?

We have a similar situation as you and have done them manually. Cetec offers an option for a file upload with current rates for the whole country. There is a cost involved. I would contact them directly for more information if you are interested.