As tax reform efforts progressed late last year, there were high hopes that the individual Alternative Minimum Tax (AMT) would be repealed. Unfortunately, it still exists under the TCJA.
The good news is that you are allowed a relatively generous AMT exemption, which is deducted in calculating your AMT income. The TCJA significantly increases the AMT exemptions for 2018–2025. The exemption is phased out when your AMT income surpasses the applicable threshold, but the TCJA greatly increases those thresholds for 2018–2025. This means that fewer people will be subject to the AMT rules.