For the 1095-A part how is the amount how much you qualify for calculated

That is handled by the companies that issue the Form 1095-A.

You only need to enter the Form 1095-A as received in the TurboTax program.

To enter your Form 1095-A -

• Click on Federal Taxes (Personal using Home and Business)
• Click on Deductions and Credits
• Click on I'll choose what I work on (if shown)
• Scroll down to Medical
• On Affordable Care Act (Form 1095-A), click the start or update button

Or enter 1095-a in the Search box located in the upper right of the program screen. Click on Jump to 1095-a