Mistake on parents house hold income 2015 / 16 submission

HOW CAN I CHANGE THE MISTAKE I MADE ON THE FIGURES -
I IN PUTTED FOR HOUSE HOLD INCOME -
FATHER'S SUBMISSION INCORRECT -
MOTHER'S SUBMISSION CORRECT ?
IS THERE AN ON LINE FORM TO CORRECT THINGS ?
OR A PHONE NUMBER TO RING TO AGAIN TO CORRECT THINGS ?
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N.B. THE MISTAKES PUT OUR INCOME JUST OVER THE £16,190 LIMIT !
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PLEASE SEE BELOW : -
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UCB Standard Tuition Fee Waiver - £1,090 discount off your tuition fees PER YEAR
If your household income is £16,190 or less and you are eligible to receive support from Student Finance England you will receive a £1,090 discount off your tuition fees. If your household income remains at £16,190 or below for the remainder of your course you will continue to receive the UCB Standard Tuition Fee Waiver for the subsequent taught years of your programme.
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LOOKING FOREWORD TO YOUR RESPONSE .
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REGARDS,
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STEVE .