What is "Expenses / Deductions (in case other than family pension) Expenses / Deductions" under Section 57 in ITR 2?

What is “Expenses / Deductions (in case other than family pension) Expenses / Deductions” under Section 57 in ITR 2 ?

What proof we need for this one ? Do we need to carry forward this to future years ?

Hi, but where do we show in quicko for the expenses to be claimed under section 57 against the income from other source of income. thanks