Managing IRA distributions

A brief background for context, I'm retired and my income is a combination of interest, dividends, social security, annuity, IRA distributions and brokerage mutual fund investments including capital gains.  With Turbotax before the tax reform, I was able to calculate the IRA distributions so I maxed out the 15% tax bracket and then drew other income from selling brokerage account mutual funds with capital gains also taxed at 15%.  Now, the Tax Worksheet is so complicated, I actually can't figure out how to manage my income sources to minimize my taxes as I did before.  Do any of you have any suggestions for calculating IRA distributions to minimize taxes with the 2019 Turbotax?  Thanks.