If it was me ? I would send the originals when it comes to the government. Make sure you have perfect copies for your own records and make sure you put the date on them that they were mailed. Safer to send the originals so no one has an excuse to say you did something wrong.
I need to send documents to the federal government, I've made copies and signed all pages. Do I send the originals or the copies, it doesn't say which to send them?
The government wants to see original signatures so send the originals.
Send the originals and I would send them registered mail and require a signature. My dad has had two different incidents where they say he didn't send in paperwork. After the first time he sent it in with a signature request. When they told him they hadn't received it he told gave them the person's name that signed for it and on what date. It is an extra step but worth it.