Estimated tax related to Self Employment

Hello,

I have a small business and do have an EIN.  We had a Partnership and filed a Partnership return for 2024.  We, going forward, will be operating under a single member LLC structure and for 2025 taxes, tax season 2026, will be filing the business tax on a schedule C with our personal taxes.  I am about to make an estimated tax payment for the business and I dont know if I should use the Business EIN or if I should use my social security number to make the estimated tax payment in this circumstance?  (Partnership with EIN filing 2024 return though moving to Single Member LLC filing on schedule C for 2025)  I need to make estimated payments for 2025 and you have to put either EIN or Social Security number. 

Thank you,

Carol