You must pass it as parameter or assign directly the value of sqlresults.untypeid
I prefer this way (more visible and with syntax coloring)

TEXT TO lcSelect NOSHOW PRETEXT 15 TEXTMERGE
     SELECT b.* 
            FROM Table1 a
            INNER JOIN Table2 b on LTRIM(RTRIM(a.unitcode)) = LTRIM(RTRIM(b.unitcode))
                                AND LTRIM(RTRIM(a.unittype)) = LTRIM(RTRIM(b.usertyped))" ;
            WHERE a.inactive = 'TRUE' AND
                  a.untypeid = <<sqlresults.untypeid>> -- If untypeid type is differenet than numeric you must convert it
ENDTEXT

* or
TEXT TO lcSelect NOSHOW PRETEXT 15 TEXTMERGE
     SELECT b.* 
            FROM Table1 a
            INNER JOIN table2 b on LTRIM(RTRIM(a.unitcode)) = LTRIM(RTRIM(b.unitcode))
                                AND LTRIM(RTRIM(a.unittype)) = LTRIM(RTRIM(b.usertyped))" ;
            WHERE a.inactive = 'TRUE' AND
                  a.untypeid = ?sqlresults.untypeid -- No convertion needeed
ENDTEXT