The IP Pin will change each and every year. This is an Identity Protection Pin.
You can get an Identity Protection pin here, or if you lost your IP PIN, you can go here to Retrieve IP PIN.
Here are two ways to navigate to the section to enter the 6 digit IP PIN:
Or another way:
Desktop application guidance and HELP is woefully inadequate in this area. The Help for the 5-digit signature PIN doesn't mention the similar, but distinct, 6-digit IRS PIN that must be input into the program in a completely different spot, in order for a return to submit successfully. Some verbiage in the Help file and advice to be sure that both individuals (in a joint filing) have input their IRS PIN(s) if set on their IRS account is mandatory.