You probably don't have to enter the amount in Box 2f. Box 2a already includes the amount entered in Box 2f. To follow-up on the comments from @Mike9241, only RICs and REITS need to complete Box 2f. The instructions for Form 1099-DIV provides the following about Box 2f:
- Only RICs and REITs should complete boxes 2e and 2f. Boxes 2e and 2f do not need to be completed for recipients that are U.S. individuals.
@Susanne Rudiger