Having a degree in math-related subject may help but may not necessarily mean you are an expert in that subject. A teaching degree for tutoring is generally not required, but you should be able to prove that you are proficient in that subject and can effectively help others improve in that specific area or subject.
A good way to do this is to take on a student or two free of charge or for a very low rate. If the student improves and the teachers and parents are happy, you will have the strong endorsements you need to start building a math tutoring career. I know if you want to work with https://www.ezymathtutoring.com.au/ or other similar tutoring organizations, you will have to take a certification test to check your proficiency. They may also have a certain tutoring method you will have to follow and that generally works.
Working with a tutoring company has its advantages because they will get you the students but they are not always easy to get on with because of their requirements.