Earlier quoted context omitted.
Interestingly, tax refunds are not always tax deductible, either. I paid federal taxes on the previous year's state tax refund this year. How does that make ANY sense?
It makes sense because you didn't pay federal taxes on that amount last year. Ideally your withholding should have been perfect last year and your refund would have been $0, and then you would have paid the federal tax amount on it last year. Relatedly, I got a ~$5k state refund last year and I'm not paying additional federal tax on it this year because the SALT deductions are now gone under Trump's tax changes, so m…
Since you won't be deducing SALT in 2018, any state refund in 2019 wouldn't be reportable for federal tax year 2019.
If this were otherwise, people would have purposefully massively over pay to the state in 2017, claim a large deduction in tax year 2017, get a large refund in 2018, and not have to pay back the deduction they didn't really deserve.