I ended up filing my taxes online through Turbo Tax. In the chain is an instruction to use the Other Tax Situations tab. I entered my 6 digit PIN there. Keep in mind that I had to check my Account with my online IRS account to get the current and correct PIN.
As I got ready to file, and in checking my information, I saw another PIN number which only allows 5 digits. It didn't have the same PIN that I had entered in my Other Tax Situations. I just gave it a 5 digit number. In truth, I have no idea what this latter PIN number is or is supposed to be. But I decided to wing it and sent it again. This time it worked. The PIN number in the Other Tax Situations is the PIN that the IRS wants to see.
Hope this works. Multiple PIN number is a little confusing, but in the end I was able to file online.
