Do not lie to the government, even if you are following orders. In the US, federal and state law differ, but most have some variant of the federal false claims statute: https://www.law.cornell.edu/uscode/text/18/287

> Whoever makes or presents to any person or officer in the civil, military, or naval service of the United States, or to any department or agency thereof, any claim upon or against the United States, or any department or agency thereof, knowing such claim to be false, fictitious, or fraudulent, shall be imprisoned not more than five years and shall be subject to a fine in the amount provided in this title.

This has been interpreted very broadly to encompass pretty much anything you submit to the government in support of the government paying you or your company money.

Probably nobody will notice, and you probably won’t get prosecuted. But this stuff comes to light all the time if something goes sideways, or if the government is investigating something else.