how do I get the final taxable total earned from pension when it has a insurance premium bx 5 deducted from the gross earned. ? program won't allow to be reflected total

You would need to report this in the following manner to receive a taxable total that is reported in Box 2a

1. Open or continue your return.
2. In the Federal section, select Wages & Income or income if working in "Turbo tax" online.
3. Scroll to locate Retirement Plans and Social Security.
4. Select Start or Revisit next to IRA, 401(k), Pension Plan Withdrawals (1099-R) Or Social Security ( SSA 1099, RRB 1099)
5. Report your 1099R exactly how you receive it. Leave Box 2A blank if it is blank.
6. After answering a series of questions you will reach a screen that mentions "let's Figure out How Much is Taxable"
7. Check the box that mentions" I need to figure out how much of this is taxable".
8. Next it asks if the payments are guaranteed five years or longer. Make a selection.
9. Next you will enter annuity information. it will ask the start date you received the annuity. It then asks how much you contributed to the retirement, how many months you received payment in 2024, and whether or not there was a Death Exclusion.
10. Then it asks if the annuity covers just you or is it a joint annuity with another individual, such as your spouse.
11. Then it asks what you age was when you started receiving annuity payments and if you are under retirement age for the plan.  
12. Based on the information given, you now have a taxable amount that is entered in Line 2A of your 1099R.