@pianolady 

"Yes, clients received advanced premium credit. "

Okay, so they did get an Advanced Premium Tax credit (meaning, it was paid out as applied to the premium they owed, to reduce their payment requirement)?

Bill has asked Twice, so this makes Three Times. It matters to their determination.

Read the Specific instructions for Line 6 here:

https://www.irs.gov/pub/irs-pdf/i8962.pdf

Because it tells you what happens when the projection is to fall between 100% and 400% and then you fall short of this.