This part:

"If you make this election, reduce the otherwise taxable amount of your pension or annuity by the amount excluded. The amount shown in box 2a of Form 1099-R doesn't reflect this exclusion. Report your total distributions on Form 1040, 1040-SR, or 1040-NR, line 5a. Report the taxable amount on Form 1040, 1040-SR, or 1040-NR, line 5b. Enter “PSO” next to the appropriate line on which you report the taxable amount."