I'm not sure why that number would be negative. You can only deduct up to $10,000 of state and local taxes on your federal return, that is why you see reference to the amount of state taxes over $10,000. Since that amount is negative, it probably means your state and local tax itemized deduction is not limited by the $10,000 threshold.
On my Deductions & Credits Summary page.
it shows
...................................................................................2021..............2022.....
(stuff on a bunch of lines)
State and local taxes greater than 10,000 ( $0 ) (-$930)
______________
In my situation, the -$930 represents the $$ amount I paid to the state (or local tax people) that exceeded the SALT limit this year. This value can limit whether a State refund will be taxed next year...but is needed to know only if you itemize deductions (Federal) this year.