According to the blog of Inquiry Science Network, after modifying the natural science fund applied by your boss, you can't apply for other funds for the following reasons:

1. Intellectual property rights: If you use other people's research results or application materials, you may infringe other people's intellectual property rights. It is very important to respect intellectual property rights in academia and scientific research.

2. Academic ethics: tampering with or using other people's application materials without permission violates academic ethics. Academic ethics is the cornerstone of scientific research, and any violation of academic ethics will cause serious damage to academic research and personal reputation.

3. Fund project requirements: Each fund project has its own specific application requirements and evaluation criteria. If the application materials prepared by other projects are directly used, it may not meet the requirements of the target fund, thus affecting the success rate of the application.