In order to find tax preparation course simply do an online search. These tax preparation courses can be taken with an actual licensed tax preparer or from a non-profit organization that provides tax preparation for low income individuals. Start by doing an online search for courses in your city and see what comes up for your area. If you can not find results for the city you live in add your city name in the search and this should pull some city results nearby.
Then you will need to figure out which tax preparation classes fit your needs. Something to think about is why you want to take the tax preparation courses, and how long are you planning on doing this, will it be way to make money in a crunch or are you going to make this a profession. These questions will help focus you on the steps you need to take. For example, are you in it just to make some extra seasonal money or are you trying to get a job for a tax preparer since you can save money by not paying for the courses and in some cases you'll get sent to a take a course for the company you work for anyway.
The next question might be if you want to learn tax law so you can do your own and your family's tax returns more accurately, if so than try a non-profit organization in your area that provides assistance to low income individuals and families. You might not be compensated but you also don't have to pay for the tax courses they provide. So this is a good trade even though tax laws are constantly changing, you will have a leg up in knowing how they are calculated and when they will be likely change.
And finally if you are going to make this a profession then you will want to go to school for your courses in tax preparation. This is so you will be qualified to work for a company that specializes in tax law on a more intricate level. While the level of education you will need can vary depending on what your ultimate goal is as a general rule the more school the more options that will be available to you.