Solved
I already set it up but I need to change my initial payment to lower amount
You can amend an existing payment agreement online if you still meet the conditions for an online agreement.
You can apply for, or raise or lower the monthly payment. Go to the IRS Online Payment Agreement page.
Note the information you will need available when you make (or amend) your application.
The IRS also explains when and how to use their Online Payment Agreement in this 9 minute video.
Do not file Form 9465 if you are currently making payments on an installment agreement or can pay your balance in full within 120 days. You can call the IRS with installment payment questions at 1-800-829-1040.
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