Where is the Form 8962?

Form 8962 is used to calculate the advance premium tax credit and to reconcile it with the advance premium already received.

In TurboTax, you do not fill form 8962 yourself. The form is automatically populated by TurboTax and included in your tax return after you have entered your form 1095-A

I entered in my 1095-A but ant the end of my review it says that the form 8962 is not ready. So I cannot file until it is?

You are correct. You cannot file your return until the form is ready. You can find the forms availability at this site: https://ttlc.intuit.com/community/forms/help/irs-forms-availability-table-for-turbotax-individual-personal-tax-products/00/26224