There are 1 and 2 (or possibly other) notations next to certain deductions on pay statements like this:
These correspond to footnotes listed at the end of the stub details, which give the employee more details on the deductions coming out of his/her pay statement, these are the most common three:
These footnotes can be added, removed, or edited on the company deduction setup in the Pay Statement Section. These are set company-wide.