If you are assuming the current law, then many, but not all, of the provisions of the TCJA revert to back prior tax laws. Specifically, the deduction is the larger of the pre-TCJA standard deduction or your itemized deductions and the personal exemption the pre-TCJA exemption.

However, the standard deduction and the personal exemption will continue to be indexed by the chained CPI, not the regular CPI, hence the real value of the standard deduction and the personal exemption decrease year by year since the chained CPI is less than the regular CPI.