There are many things you can try, but the first thing you should do is try and narrow down your main challenges. Some people fail the GED because they simply lack the necessary knowledge, but it’s also possible to fail because you didn’t interpret the questions properly or couldn’t finish the test in time.
One way to better understand your strengths and weaknesses is to take training tests, which you also receive from programs like the Onsego GED prep. And there are other places online where you can find training GED tests.
There are different ways to address different issues. For example, you can study and take more classes to expand your knowledge, take more training tests to get better at answering the GED faster, improve your reading to get better at interpreting the test, etc. It all depends on what you’re struggling with the most.