When you file your taxes, TurboTax will ask you How would you like to pay your federal taxes? One of the options are to Request an IRS payment Plan. TurboTax will walk you through the steps to setup your payment plan.
The monthly minimum payment for an installment plan is your balance due divided by 72. Refer to the TurboTax article What is the Minimum Monthly Payment for an IRS Installment Plan? for additional information.
There are several options when you have a tax bill that you don't have the money to pay. Refer to the following articles: How to Pay Taxes: 10 Ways to Pay Your Tax Bill, Unable to Pay Your Tax Bill? Here’s What To Do, and the IRS article What if I can’t pay my taxes?
Go to this IRS website for an online payment plan application - https://www.irs.gov/payments/online-payment-agreement-application
Where on the site can I find the walk-through on how to apply for a payment plan with the IRS?
You will need to scroll down to the middle of the page to select the type of plan you want. You can choose short term or long term. Then you will just walk through and answer the questions to apply for the payment plan.