The IRS is stupid.

If the SLCSP did not change throughout the year, as Lisa said, you can just add or subtract $1 for one month in column A of the 1095-A.

However, I would ALSO include a VERY NASTY LETTER to the IRS with a photocopy of the Instructions that indicate that line 10 should be "YES" (and therefore lines 12-23 should not be filled out) and they should be following their own Instructions rather than wasting the taxpayer's time.

https://www.irs.gov/instructions/i8962#en_US_2022_publink1000305196