First, you check the Line Layouts that exist in your Form, and if required, create new ones.
In the screen shot I posted, you can see that in Goup 05 of Window W1, you can see that WT 9220 uses the layout of PTyp BD, CTy. 3 for data comming from table CRTK, the layout of PTyp BD, CTy. 2 for data comming from table RT, and the layout of PTyp AR, CTy. 1 for data comming from table RTS (Retroactive changes).
You can also see that 4 different Line Layouts were created for PTyp AA, and if the first 3 were to be used for a WT, CTy. 1 would be used for table RTS (WT. retroactive amount), CTy. 2 would be used for table RT (WT, Rate, Number and Amount) and CTy. 3 would be used for table CRT (WT, Cumulative Amount). The WT information always falls in the same place, but all other information falls in different columns in the Remuneration Statement.