Take it to the NRA.
No. However, to possess or purchase firearms or ammunition, residents must have a Firearm Owner's Identification card, which is issued by the state police. They don't register guns, just gun owners.
You cannot. There is not a national registration system for firearms. Hopefully, there never will be.
You would have to go to your local gun shop and register your firearm there. Then, after completing that, you would have to go the gun range and register yourself there, with your gun permit.
Depends on where you are. In MOST of the US, there is no requirement to register an ordinary firearm. There is also no place to register a gun- on line or otherwise.
No
No.
no
No
The answer is, ironically, unknown.
Texas does not require gun registration.
No,