Under deductions, State and Local Taxes Greater than $10,000: in 2017 = N/A 2018 now has (-$11,091). I do not know where this came from?

[VolvoGirl]

SALT is State And Local Tax.  Which includes property tax, any state tax paid like for last year’s return and includes any state withholding from your W2s and any 1099s you have.  You can only deduct up to 10,000 (5,000 MFS) for SALT State and Local Taxes.

So the amount over 10,000 shows up as a negative number.  It doesn’t mean anything and doesn’t go anywhere.  Just for your info to let you know how much you can’t deduct this year.  Last year 2017 there was no limit so it says N/A (not applies).

This year the Standard Deduction will be doubling so many people will be switching to the Standard Deduction.

FAQ on 2018 changes https://ttlc.intuit.com/questions/4482394-how-will-tax-reform-affect-my-2018-federal-tax-return

For 2018 the standard deduction amounts are:
Single 12,000 + 1,600 for 65 and over or blind
HOH 18,000 + 1,600 for 65 and over or blind
Joint 24,000+ 1,300 for each 65 and over or blind
Married filing Separate 12,000 + 1,300 for 65 and over or blind

[CarolynM]

This is how the program accounts for the excess of state and local taxes you paid.

Therefore, you paid a total of $21,091, but the law allows only $10,000, so you have -$11,091. 

Rest assured. Your calculations will only have the $10,000 deduction.