if i have a multiple lines, Does canceling a line with eIP make the rest of the payment due immediately?

I'm on a family plan with 5 lines, and I don't need one of the lines active for the immediate future. However, the line I'd like to cancel has an EIP for it. I was wondering if I canceled this line, I could continue making EIP payments on it, or if I would be charged for the full remainder immediately.

Many thanks in advance.