Separating from the reserves (IMA)

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Dumb question, but I've gone through vPC-GR and not had much luck finding a straightforward answer.

I'm an IMA with no service committments, what would be the process for separating from the ready reserve? When I left active duty I just filled out the form on vMPF self service actions and that was that. Is it this same for reservists?

Any limitations for advance notice to separate? For active duty, if I remember correctly, it was no less than 6 months and no more than 12 to establish a separation date.

Any other gotchas you all have seen?

Thanks much!