Other financial discussions

Can you tell me what it means when they are asking for whole income gross amount when I try to out in my bank information it ask for the income gross amount of my tax refund I keep putting in the refund amount for this year and it dose not except it it keeps saying the amount i out in dose not match I don't know any other amount to put in it keep saying look at a 1040 form line 7 can you tell me where to find this