How to create a PIN number ?

[Irene2805]

If you are referring to the 6-digit IRS Identity Protection (IP) PIN, use the IRS online tool Get an IP PIN or visit Retrieve Your IP PIN for more information.

If you're referring to the 5-digit e-file PIN, it is a 5-digit number that you choose.  Enter any 5 numbers.

[legalmanagerjim]

i have not been able to create a first time 5 digit number despite several tries,...   

[KathrynG3]

The five-digit Self-Select PIN is your choice and can be anything but all zeros. It is optional. However, only you have record of it.

For more information, see: 

IRS: Self-Select PIN Method for Forms 1040 and 4868 Modernized e-File (MeF)