Once USCIS issues you a notice of denial, they must disclose the reasoning(s) behind rejecting your application. Reasons typically include nondisclosure of evidence, insufficient evidence, or that your petition did not meet the required criteria for whichever employment-based category of visa you applied for. However, there is no limit on how many times you may file an I-140. When doing so, it is key to take account of the reasons of denial from your initial application in order to make your second petition stronger.
For instance, if USCIS stated that there was no evidence disclosed of your official academic record of your Master’s degree, include a hard copy of the record when reapplying.
Another example, if USCIS stated there was insufficient evidence to prove your experience and achievements, then be sure to include numerous letters or evidence of recognition from friends, peers, and employers.
Remember, when reapplying, do not make your second application identical to the first. It is important to show USCIS that you have more to offer than what they initially reviewed in your case, and that the new additional evidence proves that you deserve to be granted approval. Although you must disclose all previously submitted evidence along with the new petition, do not just “copy and paste”— be sure to review what you are resubmitting and update any material.