Do i need my slip to add to my quarterly payements or can I just send a check with my ss # and form 1040-ES?
I don't know what you mean by your "slip." The Form 1040-ES Payment Voucher (not the entire Form 1040-ES) is what you have to send if you mail a check. If you pay online with IRS Direct Pay, as Critter suggested, you do not need any form or slip.
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