Field help: according to no. 11 of the benefits statement

Specify here the additional payments made for several previous years here, as certified in no. 11 of the benefits statement.

If your benefits statement contains multiple lines with subsequent payments for several years, specify the amounts on a separate sheet of paper and indicate the line in Form R in which the relevant additional payment amount is included.

On the basis of your entries, the tax office will examine whether a reduction in taxation is possible for these additional payments. Do not enter payments here that only apply to one calendar year. Also, do not enter partial or one-time capital payments.