Please provide us with more details on this error code. This forum is supported by users like you, who don't have access to Intuit's manual for error codes. Unless you could clarify what message you received and provide the necessary context, nobody here will be able to help you, unfortunately.
Still an AllStar
Looks like your non profit, might not be one.
- Database Validation Error: /Return/ReturnHeader/Filer/EIN: The "EIN" in the return must have been established as an exempt organization return filer in the e-file database. (rule F990-902-01)
- The return type indicated in the return header must match the return type established with the IRS for the EIN. (value 990XX, rule F990-906-01)