When filling out a W-9 for an LLC, pay special attention to the federal tax classification section. Here's a quick guide:Enter the LLC's name on the "Name" line.On the "Business name/disregarded entity name" line, enter the LLC's name if it's different from the name on the "Name" line.For the tax classification, check the appropriate box:If your LLC is a single-member LLC, check "Individual/sole proprietor or single-member LLC."If your LLC is treated as a partnership for tax purposes, check "Limited Liability Company" and enter "P" for partnership.If your LLC has elected to be taxed as a corporation, check "Limited Liability Company" and enter "C" for C corporation or "S" for S corporation.Instafill.ai's smart form-filling system can guide you through this process to ensure you select the correct classification for your LLC.