Insurance Premiums for Retired Public Safety Officers. IRS instructions say enter reduced amount on Line 5b and write "PSO" next to that. How can I do that in Turbotax?

IRS says total pension entered on Line 5a.  Deduct the health insurance premiums and enter into Line 5b.   Is there any way to write or denote "PSO" next to 5b as IRS instructs?