Why does my pension payout decline every year even though I entered it as a fixed amount?

If the growth rate of the pension is less than the inflation rate, then the inflation-adjusted (today’s dollars) value of the pension will decline over time. The program defaults to showing projections in today's dollars, so if the cash flow has a growth rate less than the inflation rate, the value in today's dollars will indeed decline each year. [...]

I have plenty of salary income left over to pay for an expense I entered in the Goals & Additional Expenses section. I am not yet retired. The expense starts next year. But this expense is being paid for out of my taxable investments and not my salary. Why is that?

You should only enter a goal/additional expense before retirement if the funds to pay for this expense will not come out of regular salary income. All expenses before retirement (Official Retirement Date Of The Plan) are first funded from contributions that would have gone to investments and then from the investments themselves. Note that the "Official Retirement Date Of The Plan" is determined [...]

How do I change the order in which funds are withdrawn from my investment accounts?

If the program needs to use investment income and/or principal it will use money from the Taxable & Tax-Advantaged accounts first, then Non-Qualified accounts, then Qualified Tax-Deferred accounts last. However, within those sections you can control the order of withdrawal by clicking on the re-order icon and then dragging and dropping rows as you see in the screenshot below. [...]

Does the input for Annual Living Expenses in Retirement include taxes?

The input for Annual Living Expenses in Retirement is before taxes, but the program calculates income and investment taxes for you, so do not add in those taxes there. However, taxes such as property taxes need to be entered by the user, either in this field or in the Goals & Additional Expenses [...]

I have an inheritance coming in the future that will not be taxed. How do I enter a 0% tax rate for this in the Additional Cash Inflows section?

You can change the tax rate for an Additional Cash Inflow to any tax rate you want. See the screenshot below. You can edit the value in the dropdown box by directly typing into it. src="https://cdn.livehelpnow.net/clients/21145/kb/ctax1_b2fbc9f6-413f-46e9-ae6c-feacc6d1a3c9.png" id="f1ed153a-ad75-4f82-b86c-9b9a7ccf368e" alt="ctax1" width="90%" height="auto" [...]