Are you trying to efile a 1099NEC that you prepared to give someone you paid? What error are you getting? Are you using the Desktop program or the Online version? Windows or Mac?
If you are using the Desktop Home & Business version, Windows and Mac are different. The Mac version only lets you use the Online Quick Employer Forms and efiles the 1099NEC & 1096 Transmittal forms to the IRS.
You can do them 2 different ways from the Windows Desktop Home & Business program. Either Online using Quick Employer Forms (QEF) -or- directly on your computer with the built in W2/1099 Reporter. . If you use the Reporter on your computer you have to mail them to the IRS and not efile.
