I selected payment plan option for my federal taxes and still haven’t heard from turbo tax on how that’s going or the IRS. Do I keep waiting or do I need to take action?

First time doing my taxes by myself. I did an initial payment for my federal then selected request payment plan on turbo tax. I haven’t heard anything and I’m worried about late payment fees. Does it just take a while before they get back to me on the payment plan? Was I supposed to request the payment plan on the irs website? TurboTax put in the request though I thought when I selected payment plan. What do I do?