By now it should be obvious that sales taxes are a major headache for many veterinarians. However, they don't have to become a financial burden for any veterinarian who understands what goods or services are taxed and which are not. Remitting or paying over only the tax due on taxable sales is as equally important as collecting sales taxes in the first place. And remember, the only common denominator among state sales tax systems is that they are all subject to change.