Do I use my social security number or ein when paying estimated taxes

[bluedeb · Accepted solution]

Use your SSN when paying your estimated taxes

Should I use my EIN or SSN?

The IRS uses the EIN to identify the taxpayer. EINs must be used by business entities--corporations, partnerships, and limited liability companies. However, most sole proprietors don't need to obtain an EIN and can use their Social Security numbers instead. Even so, you may want to obtain an EIN anyway.