@backwebstores wrote:
How do I add them?
You can't, at least not in Step-by-Step.
The entries appear on the Information Worksheet in Forms Mode and the number of lines are limited there as well. The IRS already knows how much you've deposited and the dates so that worksheet is strictly for your records while the total is entered on one line in Schedule J.
You can always generate an additional blank worksheet and enter the additional payments (with dates) to retain for your records.