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IRS successfully launches their own free Direct File - some of my fellow 'murcans are eligible
(sh.itjust.works)
For your simple[r] tax needs: https://directfile.irs.gov
They are actually not the de facto for large company when it comes to payroll. I think the majority of their customers at company’s with less than 10 employees. I use to work for Intuit on the Quickbooks payroll product. I left about two years ago but I don’t think it’s changed that much.