The TP1000 is the equivalent of a federal T183 form, authorizing the preparer to electronically file the Québec TP1 return.
If you don't have full authorization to represent a taxpayer, or if you do not want to request it using an MR-69 form, you can complete the TP-1000.TE to receive authorization just for for NetFile Québec.
The TP1000 is completed based on the answer to the authorization question in the Québec TP1 section of the of the Info worksheet:
You can set a default to this question in options:
The TP1000 has checkbox at the top of the form that to enter the signing date based on the date set in the Filing section of the Info worksheet. If you answer No to this question, manually enter the signing date in Part F.
You can set a default values for the signing dates in options: