Two boxes, one word, opposite meanings
“Current base salary” and “desired salary” sit next to each other on plenty of forms. Only one of them is a statement about what you are paid today.
The word they share is the problem. Anything matching on salary alone will find both boxes and cannot tell them apart, and the qualifier that distinguishes them is often somewhere else in the label: current total compensation, expected base, what are you looking for. Put the figure you want into the box asking what you earn, and you have made a false statement about your present pay, in the field an employer will anchor its offer to.
Worth knowing before you type: in some places employers are restricted from asking about salary history at all, and forms built for a whole country do not always know where you are sitting. A box being on the screen is not proof that it has to be filled in. Many of these fields are optional, and the form says so if you look.
What this tool does with it
It treats them as separate facts, because they are. A figure you gave for what you are looking for is never used to answer a question about what you earn now, and a box it cannot match to something you entered is left empty and flagged rather than filled with the nearest number to hand.
The same rule covers the rest of the form. A reference's name is not your name, an emergency contact's phone is not your phone, and a tool that fills those from the wrong place has quietly put wrong information in front of an employer while looking like it worked.