What is a vet monthly income tax?

There's no specific tax called a "vet monthly income tax." It's likely you're thinking about one of these possibilities:

* Income Tax: This is the tax that everyone who earns income pays, including vets. It's based on their earnings and is typically paid through a system of withholdings from paychecks. The specific income tax rules and rates vary depending on the country and state/province.

* Self-Employment Tax: If a vet works as a self-employed individual (running their own practice), they are responsible for paying both the employer and employee portion of Social Security and Medicare taxes. This is often referred to as "self-employment tax."

* Professional License Fees: Many professions, including veterinary medicine, require licenses. There may be annual or monthly fees associated with maintaining a license, which can be considered a type of professional tax.

* State and Local Taxes: Depending on where a vet lives and works, they may be subject to additional state or local taxes such as sales tax, property tax, or income tax.

To understand what taxes apply to a vet's income, it's best to consult with a tax professional or accountant. They can help you determine the specific taxes and regulations that apply to your situation.