It is a requirement for you to write all your recent jobs on job applications because that application is considered a legal document, and you must be truthful or your application could be denied – or you could be fired later if it is discovered you lied.
Before filling out an application, it is always a good idea to write out your information so that you get all the details right – your supervisors, employment dates, job titles, and reasons for leaving. This can be more time-consuming if you are applying for a government or security job, as the application may require your employment record for many years.
In addition, you need to explain why you left a job, whether it was voluntary or because you were fired. Be honest about the reason you left, although it's important to phrase it professionally and maturely. Don't say, "I hated my boss. He was such a loser." Instead, say something like, "My boss and I differed in the way we approached building out the team." Never badmouth a former employer or boss – always say it was a growing experience and then quickly move on to what you have to offer.
It is not required to include all your recent jobs on job applications. It's a good idea to tailor each application and resume to the specific position for which you are applying. For example, you may have worked for three months at a temp agency before landing a job with an accounting firm. If you are applying for another accounting job, you may leave the temp agency off the resume. On the other hand, you don't want to create too big of a resume gap. If omitting recent jobs makes a year-long hole in your work history, that isn't good, either. You don't want to look unemployed when you actually were. It's a bit of a balancing act, deciding what should stay and what should go. Here is some good advice from the pros that can help you choose wisely. The bottom line is that you need to appear skilled, dedicated, and consistent to your future employer. Create a work history that shows you have a strong background and good work ethic. This could mean listing several jobs to show continuous employment or focusing on the more relevant jobs to launch a career. Either way you can choose how to represent yourself.