Full recharacterization Roth to Traditional? Any impacts? What forms do I need?

I opened a Roth IRA in 2016 and funded it with $3,600.

I did not make any additional deposit afterward.

I did not fill my taxes yet.

Can I recharacterize it to a Traditional IRA? What are the impacts? Any fees/penalties? How do I handle that in my tax return? Should I just declare the contribution of $3,600 to a Traditional IRA and not even mention that it was first a Roth IRA contribution?

What forms should I request from my IRA custodian to make sure everything is in order?

Thanks