In the first screen of the Health Insurance tab, indicate that you had health insurance all year. For the uncommon plan question, say "Yes" because of those 2 months. The point of this question is really "do you have a 1095-A?". On the following screens, you will then be prompted to enter the 1095-A. Enter it exactly as it appears.
You don't type in any tax forms for the portion of the year that you had work/ private insurance (not on the federal return, at least). You indicated that you had coverage all year, so that's all that's needed for March-December.
The reason you type in the 1095-A has to do with the Premium Tax Credit and any possible repayment or additional tax credit for those 2 months (or possibly just the 1 month, in your case). If you didn't have this 1095-A, you would have said No to the question and would be completely done with this section.
