Thank you. I was able to generate the Form 1139 and fill out the information for the prior years.

IRS Instructions say it should not filed with the Form 1120.

I spoke with chat support and they said once I e-file, the 1120 and 1139 will be submitted but "separated" to comply with the IRS requirements. Does that sound about right to you? I just want to make sure they're not going to be sent together at once.